Question

Solve: 16x2 − 81 = 0.

x = 4, 9
x = −4, −9
x = 9 over 4, x = −9 over 4
x = 81 over 16, x = −81 over 16

Answer 1

Add 81 to both sides.
16x^2−81+81=0+81
16x^2=81

Answer 2

Thank you :D

Answer 3

No lol hold up

Answer 4

Oh ok

Answer 5

from there you divde both sides by 16 since we are isolating x

Answer 6

You are left with
x= 81/16

Answer 7

Thanks :D

Answer 8

so whats the answer? ;p