Question

Solve x2 – 64 = 0.

1. Isolate x2: x2 = 64
2. Apply the square root property of equality: 7x2 = 1/64
3. Isolate the variable:
0
x =
x=

Answer 1

x = - 8, x = 8

Explanation:

Given

x² - 64 = 0 ( add 64 to both sides )

x² = 64 ( take the square root of both sides )

x = ±
`√(64)` = ± 8