Solve x2 - 64 = 0.

1. Isolate x2: x2 = 64

2. Apply the square root property of equality:

3. Isolate the variable: x = ? x=?

Your steps are correct. To isolate the variable, you need to square root both sides, and it's worth noting that every positive number has two solutions to its roots: a positive number and a negative number.

For example, sqrt64 is not on 8, but - 8 as well because - 8 * - 8 = 64

Therefore, x = 8 and x = - 8