Question

Can someone give me a hand? XD
5. Solve for x 16x2 − 81 = 0.

x = 4, 9
x = −4, −9
x = , x = −
x = , x = −

Answer 1

ooops it didn't paste correctly

Answer 2

Find the two squares: (4x)^2 – (9)^2 = 0
Factor: (4x + 9)(4x – 9) = 0
Set each of the factors equal to 0, and solve: 4x + 9 = 0; 4x – 9 = 0

x = ± 9/4

Answer 3

did u get the answer

Answer 4

I can't get the right symboles to show my results! by the way this is a quadratic equation!