(4a+4)(4a-4)=

Solution for (4a+4)(4a-4)= equation:

Simplifying
(4a + 4)(4a + -4) = 0

Reorder the terms:
(4 + 4a)(4a + -4) = 0

Reorder the terms:
(4 + 4a)(-4 + 4a) = 0

Multiply (4 + 4a) * (-4 + 4a)
(4(-4 + 4a) + 4a * (-4 + 4a)) = 0
((-4 * 4 + 4a * 4) + 4a * (-4 + 4a)) = 0
((-16 + 16a) + 4a * (-4 + 4a)) = 0
(-16 + 16a + (-4 * 4a + 4a * 4a)) = 0
(-16 + 16a + (-16a + 16a2)) = 0

Combine like terms: 16a + -16a = 0
(-16 + 0 + 16a2) = 0
(-16 + 16a2) = 0

Solving
-16 + 16a2 = 0

Solving for variable 'a'.

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

Add '16' to each side of the equation.
-16 + 16 + 16a2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 16a2 = 0 + 16
16a2 = 0 + 16

Combine like terms: 0 + 16 = 16
16a2 = 16

Divide each side by '16'.
a2 = 1

Simplifying
a2 = 1

Take the square root of each side:
a = {-1, 1}