x^2 - 81 = 0

Question

a) -square root 9 , square root 9

b) -81 , 81

c) -9 , 9 ~~ MY ANSWER ~~

d) no real solutions

Answer 1

one more:

3x^2 - 147 = 0

a) -47, 49

b) -7, 7 ~~MY ANSWER~~

c) -square root 7 , square root 7

Answer 2

both look ok.

Answer 3

Okay, Thanks!