(a+6)(a-6)=

Solution for (a+6)(a-6)= equation:

Simplifying
(a + 6)(a + -6) = 0

Reorder the terms:
(6 + a)(a + -6) = 0

Reorder the terms:
(6 + a)(-6 + a) = 0

Multiply (6 + a) * (-6 + a)
(6(-6 + a) + a(-6 + a)) = 0
((-6 * 6 + a * 6) + a(-6 + a)) = 0
((-36 + 6a) + a(-6 + a)) = 0
(-36 + 6a + (-6 * a + a * a)) = 0
(-36 + 6a + (-6a + a2)) = 0

Combine like terms: 6a + -6a = 0
(-36 + 0 + a2) = 0
(-36 + a2) = 0

Solving
-36 + a2 = 0

Solving for variable 'a'.

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

Add '36' to each side of the equation.
-36 + 36 + a2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + a2 = 0 + 36
a2 = 0 + 36

Combine like terms: 0 + 36 = 36
a2 = 36

Simplifying
a2 = 36

Take the square root of each side:
a = {-6, 6}