(a-2)(a+2)=

Solution for (a-2)(a+2)= equation:

Simplifying
(a + -2)(a + 2) = 0

Reorder the terms:
(-2 + a)(a + 2) = 0

Reorder the terms:
(-2 + a)(2 + a) = 0

Multiply (-2 + a) * (2 + a)
(-2(2 + a) + a(2 + a)) = 0
((2 * -2 + a * -2) + a(2 + a)) = 0
((-4 + -2a) + a(2 + a)) = 0
(-4 + -2a + (2 * a + a * a)) = 0
(-4 + -2a + (2a + a2)) = 0

Combine like terms: -2a + 2a = 0
(-4 + 0 + a2) = 0
(-4 + a2) = 0

Solving
-4 + a2 = 0

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + a2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + a2 = 0 + 4
a2 = 0 + 4

Combine like terms: 0 + 4 = 4
a2 = 4

Simplifying
a2 = 4

Take the square root of each side:
a = {-2, 2}