(h+15)(h-15)=

Solution for (h+15)(h-15)= equation:

Simplifying
(h + 15)(h + -15) = 0

Reorder the terms:
(15 + h)(h + -15) = 0

Reorder the terms:
(15 + h)(-15 + h) = 0

Multiply (15 + h) * (-15 + h)
(15(-15 + h) + h(-15 + h)) = 0
((-15 * 15 + h * 15) + h(-15 + h)) = 0
((-225 + 15h) + h(-15 + h)) = 0
(-225 + 15h + (-15 * h + h * h)) = 0
(-225 + 15h + (-15h + h2)) = 0

Combine like terms: 15h + -15h = 0
(-225 + 0 + h2) = 0
(-225 + h2) = 0

Solving
-225 + h2 = 0

Solving for variable 'h'.

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

Add '225' to each side of the equation.
-225 + 225 + h2 = 0 + 225

Combine like terms: -225 + 225 = 0
0 + h2 = 0 + 225
h2 = 0 + 225

Combine like terms: 0 + 225 = 225
h2 = 225

Simplifying
h2 = 225

Take the square root of each side:
h = {-15, 15}