(c+4)(c-4)=

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

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

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

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

Multiply (4 + c) * (-4 + c)
(4(-4 + c) + c(-4 + c)) = 0
((-4 * 4 + c * 4) + c(-4 + c)) = 0
((-16 + 4c) + c(-4 + c)) = 0
(-16 + 4c + (-4 * c + c * c)) = 0
(-16 + 4c + (-4c + c2)) = 0

Combine like terms: 4c + -4c = 0
(-16 + 0 + c2) = 0
(-16 + c2) = 0

Solving
-16 + c2 = 0

Solving for variable 'c'.

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

Add '16' to each side of the equation.
-16 + 16 + c2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + c2 = 0 + 16
c2 = 0 + 16

Combine like terms: 0 + 16 = 16
c2 = 16

Simplifying
c2 = 16

Take the square root of each side:
c = {-4, 4}