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Solve the System of Equations Using Elimination {x2+y2=81x2−y2=81\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 81 \\x ^ { 2 } - y ^ { 2 } = 81\end{array} \right.

Question 3

Multiple Choice

Solve the system of equations using elimination.
- {x2+y2=81x2−y2=81\left\{ \begin{array} { l } x ^ { 2 } + y ^ { 2 } = 81 \\x ^ { 2 } - y ^ { 2 } = 81\end{array} \right.


A) x=9,y=9;x=−9,y=9x = 9 , y = 9 ; x = - 9 , y = 9
B) x=−9,y=0;x=−9,y=9x = - 9 , y = 0 ; x = - 9 , y = 9
C) x=9,y=0;x=−9,y=0x = 9 , y = 0 ; x = - 9 , y = 0
D) x=9,y=0;x=9,y=9x = 9 , y = 0 ; x = 9 , y = 9

Correct Answer:

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