Question 1

Perform the operation and write the result in standard form.​ $( 8 - 7 i ) ^ { 2 }$ ​

Accepted Answer

A) ​ $15 - 112 i$ 
B) ​ $- 15 - 112 i$ 
C) ​ $15 + 112 i$ 
D) ​ $17 - 112 i$ 
E) ​ $- 15 + 112 i$ 
A) ​ $15 - 112 i$ 
B) ​ $- 15 - 112 i$ 
C) ​ $15 + 112 i$ 
D) ​ $17 - 112 i$ 
E) ​ $- 15 + 112 i$

Question 2

Do the operation and express the answer in a + bi form.​ $( 5 + \sqrt { - 16 } ) ( 4 - \sqrt { - 4 } )$ ​

Accepted Answer

A) 28 - 5 i 
B) - 28 + 6 i 
C) - 5 + 6 i 
D) 5 - 6 i 
E) 28 + 6 i 
A) 28 - 5 i 
B) - 28 + 6 i 
C) - 5 + 6 i 
D) 5 - 6 i 
E) 28 + 6 i

Question 3

Find real numbers a and b such that the equation is true.​ $a + b i = - 8 + 18 i$ ​

Accepted Answer

A)  $a = - 12 , b = 22$ 
B)  $$a = - 10 , b = 20$$ 
C) ​ $a = - 11 , b = 21$ 
D)  $a = - 9 , b = 19$ 
E)  $$a = - 8 , b = 18$$ 
A)  $a = - 12 , b = 22$ 
B)  $$a = - 10 , b = 20$$ 
C) ​ $a = - 11 , b = 21$ 
D)  $a = - 9 , b = 19$ 
E)  $$a = - 8 , b = 18$$

Question 4

Simplify the expression. ​
I -14
​

Accepted Answer

A) i 
B) -3i 
C) -i 
D) -1 
E) 1 
A) i 
B) -3i 
C) -i 
D) -1 
E) 1

Question 5

Simplify the complex number and write it in standard form.​ $- 42 i ^ { 5 }$ ​

Accepted Answer

A) ​ $- 42 i ^ { 3 }$ 
B) ​ $42 i ^ { 3 }$ 
C) ​ $- 42 i$ 
D) ​ $- 42$ 
E) ​ $42 i$ 
A) ​ $- 42 i ^ { 3 }$ 
B) ​ $42 i ^ { 3 }$ 
C) ​ $- 42 i$ 
D) ​ $- 42$ 
E) ​ $42 i$

Question 6

Solve the equation and write complex solutions in standard form. ​​ $x ^ { 2 } - 18 x + 91 = 0$ ​

Accepted Answer

A) ​ $x = 9 + \sqrt { 10 } i , 9 - \sqrt { 10 } i$ 
B) ​ $x = 10 + \sqrt { 2 } i , 10 - \sqrt { 2 } i$ 
C) ​ $x = 9 + \sqrt { 2 } i , 9 - \sqrt { 2 } i$ 
D) ​ $x = 10 + \sqrt { 10 } i , 10 - \sqrt { 10 } i$ 
E) ​ $x = 2 + \sqrt { 10 } i , 2 - \sqrt { 10 } i$ 
A) ​ $x = 9 + \sqrt { 10 } i , 9 - \sqrt { 10 } i$ 
B) ​ $x = 10 + \sqrt { 2 } i , 10 - \sqrt { 2 } i$ 
C) ​ $x = 9 + \sqrt { 2 } i , 9 - \sqrt { 2 } i$ 
D) ​ $x = 10 + \sqrt { 10 } i , 10 - \sqrt { 10 } i$ 
E) ​ $x = 2 + \sqrt { 10 } i , 2 - \sqrt { 10 } i$

Question 7

Do the operation and express the answer in a + bi form.​ $\frac { 17 } { i ^ { 31 } }$ ​

Accepted Answer

A) -17i 
B) -85i 
C) -17 
D) 17i 
E) 17 
A) -17i 
B) -85i 
C) -17 
D) 17i 
E) 17

Question 8

Simplify the complex number and write it in standard form.​ $- 5 i ^ { 3 } + i ^ { 2 }$ ​

Accepted Answer

A) ​ $1 + 5 i$ 
B) ​ $- 1 - 5 i$ 
C) ​ $- 5 i$ 
D) ​ $1 - 5 i$ 
E) ​ $- 1 + 5 i$ 
A) ​ $1 + 5 i$ 
B) ​ $- 1 - 5 i$ 
C) ​ $- 5 i$ 
D) ​ $1 - 5 i$ 
E) ​ $- 1 + 5 i$

Question 9

Simplify the complex number and write it in standard form.​ $( \sqrt { - 57 } ) ^ { 3 }$ ​

Accepted Answer

A) 185,193i 
B) -57i 
C) - $57 \sqrt { 57 }$ i 
D)  $57 \sqrt { 57 }$ i 
E) -185,193i 
A) 185,193i 
B) -57i 
C) - $57 \sqrt { 57 }$ i 
D)  $57 \sqrt { 57 }$ i 
E) -185,193i

Question 10

Describe the error.​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { ( - 8 ) ( - 8 ) } = \sqrt { 64 } = 8$ ​

Accepted Answer

A) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i = - 8 i$ 
B) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = - 64$ 
C) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i$ 
D) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i ^ { 2 } = - 8$ 
E) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i ^ { 2 } = 8$ 
A) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i = - 8 i$ 
B) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = - 64$ 
C) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i$ 
D) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i ^ { 2 } = - 8$ 
E) ​ $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { 8 } i \sqrt { 8 } i = 8 i ^ { 2 } = 8$

Question 11

Do the operation and express the answer in a + bi form.Use fractions in your answer.​ $\frac { 1 } { 9 + i }$

Accepted Answer

The answer of Do the operation and express the answer...

Question 12

Perform the addition or subtraction and write the result in standard form.​ $33 + ( - 10 + 13 i ) + 20 i$ ​

Accepted Answer

A) ​ $23 + 33 i$ 
B) ​ $23 - 33 i$ 
C) ​ $- 23 - 33 i$ 
D) ​ $- 23 + 33 i$ 
E) ​ $23 + 35 i$ 
A) ​ $23 + 33 i$ 
B) ​ $23 - 33 i$ 
C) ​ $- 23 - 33 i$ 
D) ​ $- 23 + 33 i$ 
E) ​ $23 + 35 i$

Question 13

Write the complex number in standard form.​ $\sqrt { - 17.64 }$ ​

Accepted Answer

A) 17.64i 
B) 4.2i 
C) ​7.2i 
D) -4.2i 
E) -17.64i 
A) 17.64i 
B) 4.2i 
C) ​7.2i 
D) -4.2i 
E) -17.64i

Question 14

Find real numbers a and b such that the equation is true.​ $a + b i = 2 + 6 i$ ​

Accepted Answer

A) ​ $a = 4 , b = 8$ 
B) ​ $a = 6 , b = 10$ 
C) ​ $a = 2 , b = 6$ 
D) ​ $a = 3 , b = 2$ 
E) ​ $a = 5 , b = 9$ 
A) ​ $a = 4 , b = 8$ 
B) ​ $a = 6 , b = 10$ 
C) ​ $a = 2 , b = 6$ 
D) ​ $a = 3 , b = 2$ 
E) ​ $a = 5 , b = 9$

Question 15

Perform the addition or subtraction and write the result in standard form.​ $19 i - ( 15 - 3 i )$ ​

Accepted Answer

A) ​ $15 + 22 i$ 
B) ​ $- 15 - 22 i$ ​ 
C) ​ $15 - 22 i$ 
D) ​ $- 15 + 22 i$ 
E) ​ $- 15 + 25 i$ 
A) ​ $15 + 22 i$ 
B) ​ $- 15 - 22 i$ ​ 
C) ​ $15 - 22 i$ 
D) ​ $- 15 + 22 i$ 
E) ​ $- 15 + 25 i$

Question 16

Write the complex number in standard form. ​​ $\sqrt { - 0.0001 }$ ​

Accepted Answer

A) ​-0.01i 
B) ​​-0.0001i 
C) ​3.01i 
D) ​0.01i 
E) ​0.0001i 
A) ​-0.01i 
B) ​​-0.0001i 
C) ​3.01i 
D) ​0.01i 
E) ​0.0001i

Question 17

Write the quotient in standard form. ​​ $\frac { 7 - 9 i } { i }$ ​

Accepted Answer

A) ​ $- 7 - 9 i$ 
B) ​ $- 9 - 7 i$ 
C) ​ $- 9 + 7 i$ 
D) ​ $9 - 7 i$ 
E) ​ $9 + 7 i$ 
A) ​ $- 7 - 9 i$ 
B) ​ $- 9 - 7 i$ 
C) ​ $- 9 + 7 i$ 
D) ​ $9 - 7 i$ 
E) ​ $9 + 7 i$

Question 18

Perform the operation and write the result in standard form. ​​ $\frac { 3 } { 1 + i } - \frac { 4 } { 1 - i }$ ​

Accepted Answer

A)  $- \frac { 1 } { 2 }$ + $\frac { 2 } { 7 }$ i 
B)  $- \frac { 1 } { 2 }$ - $\frac { 2 } { 7 }$ i 
C)  $- \frac { 1 } { 2 }$ + $\frac { 7 } { 2 }$ i 
D)  $\frac { 7 } { 2 }$ $- \frac { 1 } { 2 }$ i 
E)  $- \frac { 1 } { 2 }$ - $\frac { 7 } { 2 }$ i 
A)  $- \frac { 1 } { 2 }$ + $\frac { 2 } { 7 }$ i 
B)  $- \frac { 1 } { 2 }$ - $\frac { 2 } { 7 }$ i 
C)  $- \frac { 1 } { 2 }$ + $\frac { 7 } { 2 }$ i 
D)  $\frac { 7 } { 2 }$ $- \frac { 1 } { 2 }$ i 
E)  $- \frac { 1 } { 2 }$ - $\frac { 7 } { 2 }$ i

Question 19

Write the quotient in standard form.​ $- \frac { 20 } { 5 i }$ ​

Accepted Answer

A) ​​4i 
B)  $\frac { 4 } { i }$ 
C) ​ $- \frac { i } { 4 }$ 
D) ​​-4i 
E) ​ $- \frac { 4 } { i }$ 
A) ​​4i 
B)  $\frac { 4 } { i }$ 
C) ​ $- \frac { i } { 4 }$ 
D) ​​-4i 
E) ​ $- \frac { 4 } { i }$

Question 20

Write the complex number in standard form.​ $\sqrt { - 36 }$ ​

Accepted Answer

A) 6i 
B) -6i 
C) 36i 
D) 7i 
E) -36i 
A) 6i 
B) -6i 
C) 36i 
D) 7i 
E) -36i

Exam 14: Complex Numbers

Perform the operation and write the result in standard form.​ (8−7i)2( 8 - 7 i ) ^ { 2 }(8−7i)2 ​

Do the operation and express the answer in a + bi form.​ (5+−16)(4−−4)( 5 + \sqrt { - 16 } ) ( 4 - \sqrt { - 4 } )(5+−16​)(4−−4​) ​

Find real numbers a and b such that the equation is true.​ a+bi=−8+18ia + b i = - 8 + 18 ia+bi=−8+18i ​

Simplify the expression. ​ I -14 ​

Simplify the complex number and write it in standard form.​ −42i5- 42 i ^ { 5 }−42i5 ​

Solve the equation and write complex solutions in standard form. ​​ x2−18x+91=0x ^ { 2 } - 18 x + 91 = 0x2−18x+91=0 ​

Do the operation and express the answer in a + bi form.​ 17i31\frac { 17 } { i ^ { 31 } }i3117​ ​

Simplify the complex number and write it in standard form.​ −5i3+i2- 5 i ^ { 3 } + i ^ { 2 }−5i3+i2 ​

Simplify the complex number and write it in standard form.​ (−57)3( \sqrt { - 57 } ) ^ { 3 }(−57​)3 ​

Describe the error.​ −8−8=(−8)(−8)=64=8\sqrt { - 8 } \sqrt { - 8 } = \sqrt { ( - 8 ) ( - 8 ) } = \sqrt { 64 } = 8−8​−8​=(−8)(−8)​=64​=8 ​

Do the operation and express the answer in a + bi form.Use fractions in your answer.​ 19+i\frac { 1 } { 9 + i }9+i1​

Perform the addition or subtraction and write the result in standard form.​ 33+(−10+13i)+20i33 + ( - 10 + 13 i ) + 20 i33+(−10+13i)+20i ​

Write the complex number in standard form.​ −17.64\sqrt { - 17.64 }−17.64​ ​

Find real numbers a and b such that the equation is true.​ a+bi=2+6ia + b i = 2 + 6 ia+bi=2+6i ​

Perform the addition or subtraction and write the result in standard form.​ 19i−(15−3i)19 i - ( 15 - 3 i )19i−(15−3i) ​

Write the complex number in standard form. ​​ −0.0001\sqrt { - 0.0001 }−0.0001​ ​

Write the quotient in standard form. ​​ 7−9ii\frac { 7 - 9 i } { i }i7−9i​ ​

Perform the operation and write the result in standard form. ​​ 31+i−41−i\frac { 3 } { 1 + i } - \frac { 4 } { 1 - i }1+i3​−1−i4​ ​

Write the quotient in standard form.​ −205i- \frac { 20 } { 5 i }−5i20​ ​

Write the complex number in standard form.​ −36\sqrt { - 36 }−36​ ​

Rectangular Coordinates

Graphs of Equations

Linear Equations in Two Variables

Functions

Analyzing Graphs of Functions

A Library of Parent Functions

Transformations of Functions

Combinations of Functions Composite Functions

Inverse Functions

Mathematical Modeling and Variation

Quadratic Functions and Models

Polynomial Functions of Higher Degree

Polynomial and Synthetic Division

Zeros of Polynomial Functions

Rational Functions

Nonlinear Inequalities

Exponential Functions and Their Graphs

Logarithmic Functions and Their Graphs

Properties of Logarithms

Exponential and Logarithmic Equations

Exponential and Logarithmic Models

Radian and Degree Measure

Trigonometric Functions The Unit Circle

Right Triangle Trigonometry

Trigonometric Functions of Any Angle

Graphs of Sine and Cosine Functions

Graphs of Other Trigonometric Functions

Inverse Trigonometric Functions

Applications and Models

Using Fundamental Identities

Verifying Trigonometric Equations

Solving Trigonometric Equations

Sum and Difference Formulas

Multiple Angle and Product to Sum Formulas

Law of Sines

Law of Cosines

Vectors in the Plane

Vectors and Dot Products

Trigonometric Form of a Complex Number

Linear and Nonlinear Systems of Equations

Two Variable Linear Systems

Multivariable Linear Systems

Partial Fractions

Systems of Inequalities

Linear Programming

Matrices and Systems of Equations

Operations With Matrices

The Inverse of a Square Matrix

The Determinant of a Square Matrix

Applications of Matrices and Determinants

Sequences and Series

Arithmetic Sequences and Partial Sums

Geometric Sequences and Series

Mathematical Induction

The Binomial Theorem

Counting Principles

Probability

Lines

Introduction to Conics Parabolas

Perform the operation and write the result in standard form. $( 8 - 7 i ) ^ { 2 }$

Do the operation and express the answer in a + bi form. $( 5 + \sqrt { - 16 } ) ( 4 - \sqrt { - 4 } )$

Find real numbers a and b such that the equation is true. $a + b i = - 8 + 18 i$

Simplify the expression. I ^-14

Simplify the complex number and write it in standard form. $- 42 i ^ { 5 }$

Solve the equation and write complex solutions in standard form. $x ^ { 2 } - 18 x + 91 = 0$

Do the operation and express the answer in a + bi form. $\frac { 17 } { i ^ { 31 } }$

Simplify the complex number and write it in standard form. $- 5 i ^ { 3 } + i ^ { 2 }$

Simplify the complex number and write it in standard form. $( \sqrt { - 57 } ) ^ { 3 }$

Describe the error. $\sqrt { - 8 } \sqrt { - 8 } = \sqrt { ( - 8 ) ( - 8 ) } = \sqrt { 64 } = 8$

Do the operation and express the answer in a + bi form.Use fractions in your answer. $\frac { 1 } { 9 + i }$

Perform the addition or subtraction and write the result in standard form. $33 + ( - 10 + 13 i ) + 20 i$

Write the complex number in standard form. $\sqrt { - 17.64 }$

Find real numbers a and b such that the equation is true. $a + b i = 2 + 6 i$

Perform the addition or subtraction and write the result in standard form. $19 i - ( 15 - 3 i )$

Write the complex number in standard form. $\sqrt { - 0.0001 }$

Write the quotient in standard form. $\frac { 7 - 9 i } { i }$

Perform the operation and write the result in standard form. $\frac { 3 } { 1 + i } - \frac { 4 } { 1 - i }$

Write the quotient in standard form. $- \frac { 20 } { 5 i }$

Write the complex number in standard form. $\sqrt { - 36 }$