(c-3)(c+3)=

Solution for (c-3)(c+3)= equation:

Simplifying
(c + -3)(c + 3) = 0

Reorder the terms:
(-3 + c)(c + 3) = 0

Reorder the terms:
(-3 + c)(3 + c) = 0

Multiply (-3 + c) * (3 + c)
(-3(3 + c) + c(3 + c)) = 0
((3 * -3 + c * -3) + c(3 + c)) = 0
((-9 + -3c) + c(3 + c)) = 0
(-9 + -3c + (3 * c + c * c)) = 0
(-9 + -3c + (3c + c2)) = 0

Combine like terms: -3c + 3c = 0
(-9 + 0 + c2) = 0
(-9 + c2) = 0

Solving
-9 + c2 = 0

Solving for variable 'c'.

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

Add '9' to each side of the equation.
-9 + 9 + c2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + c2 = 0 + 9
c2 = 0 + 9

Combine like terms: 0 + 9 = 9
c2 = 9

Simplifying
c2 = 9

Take the square root of each side:
c = {-3, 3}