Question

Pls help

Solve x²-64 = 0.
1. Isolate x²: x² = 64
2. Apply the square root property of equality: √x²= √64
3. Isolate the variable:
X=
T
x =

Answer 1

Answers: x = 8 and x = -8

Step-by-step explanation:

We simplify the square root of 64 to get 8

`√(64) = √(8^2) = 8`

Then we'll have the plus minus out front to say

`x = \pm √(64) = \pm 8`

That breaks down into x = 8 or x = -8

As a check

x^2 = (8)^2 = 8*8 = 64

x^2 = (-8)^2 = (-8)*(-8) = 64

Both values lead to 64 when squaring.