(c-1)(c+1)=

Solution for (c-1)(c+1)= equation:

Simplifying
(c + -1)(c + 1) = 0

Reorder the terms:
(-1 + c)(c + 1) = 0

Reorder the terms:
(-1 + c)(1 + c) = 0

Multiply (-1 + c) * (1 + c)
(-1(1 + c) + c(1 + c)) = 0
((1 * -1 + c * -1) + c(1 + c)) = 0
((-1 + -1c) + c(1 + c)) = 0
(-1 + -1c + (1 * c + c * c)) = 0
(-1 + -1c + (1c + c2)) = 0

Combine like terms: -1c + 1c = 0
(-1 + 0 + c2) = 0
(-1 + c2) = 0

Solving
-1 + c2 = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 1 + c2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + c2 = 0 + 1
c2 = 0 + 1

Combine like terms: 0 + 1 = 1
c2 = 1

Simplifying
c2 = 1

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