(c+7)(c-7)=

Solution for (c+7)(c-7)= equation:

Simplifying
(c + 7)(c + -7) = 0

Reorder the terms:
(7 + c)(c + -7) = 0

Reorder the terms:
(7 + c)(-7 + c) = 0

Multiply (7 + c) * (-7 + c)
(7(-7 + c) + c(-7 + c)) = 0
((-7 * 7 + c * 7) + c(-7 + c)) = 0
((-49 + 7c) + c(-7 + c)) = 0
(-49 + 7c + (-7 * c + c * c)) = 0
(-49 + 7c + (-7c + c2)) = 0

Combine like terms: 7c + -7c = 0
(-49 + 0 + c2) = 0
(-49 + c2) = 0

Solving
-49 + c2 = 0

Solving for variable 'c'.

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

Add '49' to each side of the equation.
-49 + 49 + c2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + c2 = 0 + 49
c2 = 0 + 49

Combine like terms: 0 + 49 = 49
c2 = 49

Simplifying
c2 = 49

Take the square root of each side:
c = {-7, 7}