(n+3)(n-3)=

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

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

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

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

Multiply (3 + n) * (-3 + n)
(3(-3 + n) + n(-3 + n)) = 0
((-3 * 3 + n * 3) + n(-3 + n)) = 0
((-9 + 3n) + n(-3 + n)) = 0
(-9 + 3n + (-3 * n + n * n)) = 0
(-9 + 3n + (-3n + n2)) = 0

Combine like terms: 3n + -3n = 0
(-9 + 0 + n2) = 0
(-9 + n2) = 0

Solving
-9 + n2 = 0

Solving for variable 'n'.

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

Add '9' to each side of the equation.
-9 + 9 + n2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + n2 = 0 + 9
n2 = 0 + 9

Combine like terms: 0 + 9 = 9
n2 = 9

Simplifying
n2 = 9

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