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Find All Solutions of the Equation x3+3x210x30=0x ^ { 3 } + 3 x ^ { 2 } - 10 x - 30 = 0

Question 77

Multiple Choice

Find all solutions of the equation
x3+3x210x30=0x ^ { 3 } + 3 x ^ { 2 } - 10 x - 30 = 0


A)
x=10x = \sqrt { 10 }
x=10x = \sqrt { 10 }
x=3x = - 3

B) x=7x = \sqrt { 7 }
x=7x = - \sqrt { 7 }
x=3x = - 3

C) x=10x = \sqrt { 10 }
x=7x = - \sqrt { 7 }
x=3x = 3

D) x=10x = - \sqrt { 10 }
x=10x = - \sqrt { 10 }
x=3x = 3

E) x=7x = \sqrt { 7 }
x=7x = - \sqrt { 7 }
x=3x = 3

Correct Answer:

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