(x+-8)(x+8)=80

Solution for (x+-8)(x+8)=80 equation:

Simplifying
(x + -8)(x + 8) = 80

Reorder the terms:
(-8 + x)(x + 8) = 80

Reorder the terms:
(-8 + x)(8 + x) = 80

Multiply (-8 + x) * (8 + x)
(-8(8 + x) + x(8 + x)) = 80
((8 * -8 + x * -8) + x(8 + x)) = 80
((-64 + -8x) + x(8 + x)) = 80
(-64 + -8x + (8 * x + x * x)) = 80
(-64 + -8x + (8x + x2)) = 80

Combine like terms: -8x + 8x = 0
(-64 + 0 + x2) = 80
(-64 + x2) = 80

Solving
-64 + x2 = 80

Solving for variable 'x'.

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

Add '64' to each side of the equation.
-64 + 64 + x2 = 80 + 64

Combine like terms: -64 + 64 = 0
0 + x2 = 80 + 64
x2 = 80 + 64

Combine like terms: 80 + 64 = 144
x2 = 144

Simplifying
x2 = 144

Take the square root of each side:
x = {-12, 12}