Question

plz give right answer​

Answer 1

Answer:

A) +6 and - 6

Step-by-step explanation:

see the attachment

Answer 2

Answer:

( A ) 6 , -6

Taking square on both side

$2 {x}^{2} + 9= 81 \\ 2 {x}^{2} = 81 - 9 \\ 2 {x}^{2} = 72 \\ {x}^{2} = \frac{72}{2} \\ \\ {x}^{2} = 36 \\ x = + 6 \: \: \: - 6$

hope it helps...