(x+6)(x-6)=28

Solution for (x+6)(x-6)=28 equation:

Simplifying
(x + 6)(x + -6) = 28

Reorder the terms:
(6 + x)(x + -6) = 28

Reorder the terms:
(6 + x)(-6 + x) = 28

Multiply (6 + x) * (-6 + x)
(6(-6 + x) + x(-6 + x)) = 28
((-6 * 6 + x * 6) + x(-6 + x)) = 28
((-36 + 6x) + x(-6 + x)) = 28
(-36 + 6x + (-6 * x + x * x)) = 28
(-36 + 6x + (-6x + x2)) = 28

Combine like terms: 6x + -6x = 0
(-36 + 0 + x2) = 28
(-36 + x2) = 28

Solving
-36 + x2 = 28

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + x2 = 28 + 36

Combine like terms: -36 + 36 = 0
0 + x2 = 28 + 36
x2 = 28 + 36

Combine like terms: 28 + 36 = 64
x2 = 64

Simplifying
x2 = 64

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