Question

Solve x2 - 64 = 0.

1. Isolate x2: x2 = 64
2. Apply the square root property of equality: Vx3 = +/64
3. Isolate the variable:

Answer 1

Answer: x = ±8

Explanation:

x^2 – 64 = 0

Add 64 to each side

x^2 – 64 +64= +64

x^2 = 64

Take the square root of each side

sqrt(x^2) = ±sqrt(64)

x = ±8