-64=-p^2

Solution for -64=-p^2 equation:

Simplifying
-64 = -1p2

Solving
-64 = -1p2

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add 'p2' to each side of the equation.
-64 + p2 = -1p2 + p2

Combine like terms: -1p2 + p2 = 0
-64 + p2 = 0

Add '64' to each side of the equation.
-64 + 64 + p2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + p2 = 0 + 64
p2 = 0 + 64

Combine like terms: 0 + 64 = 64
p2 = 64

Simplifying
p2 = 64

Take the square root of each side:
p = {-8, 8}