(X+5)(x-5)=90

Solution for (X+5)(x-5)=90 equation:

Simplifying
(X + 5)(x + -5) = 90

Reorder the terms:
(5 + X)(x + -5) = 90

Reorder the terms:
(5 + X)(-5 + x) = 90

Multiply (5 + X) * (-5 + x)
(5(-5 + x) + X(-5 + x)) = 90
((-5 * 5 + x * 5) + X(-5 + x)) = 90
((-25 + 5x) + X(-5 + x)) = 90
(-25 + 5x + (-5 * X + x * X)) = 90
(-25 + 5x + (-5X + xX)) = 90

Reorder the terms:
(-25 + -5X + 5x + xX) = 90
(-25 + -5X + 5x + xX) = 90

Solving
-25 + -5X + 5x + xX = 90

Solving for variable 'X'.

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

Add '25' to each side of the equation.
-25 + -5X + 5x + 25 + xX = 90 + 25

Reorder the terms:
-25 + 25 + -5X + 5x + xX = 90 + 25

Combine like terms: -25 + 25 = 0
0 + -5X + 5x + xX = 90 + 25
-5X + 5x + xX = 90 + 25

Combine like terms: 90 + 25 = 115
-5X + 5x + xX = 115

Add '-5x' to each side of the equation.
-5X + 5x + -5x + xX = 115 + -5x

Combine like terms: 5x + -5x = 0
-5X + 0 + xX = 115 + -5x
-5X + xX = 115 + -5x

Reorder the terms:
-115 + -5X + 5x + xX = 115 + -5x + -115 + 5x

Reorder the terms:
-115 + -5X + 5x + xX = 115 + -115 + -5x + 5x

Combine like terms: 115 + -115 = 0
-115 + -5X + 5x + xX = 0 + -5x + 5x
-115 + -5X + 5x + xX = -5x + 5x

Combine like terms: -5x + 5x = 0
-115 + -5X + 5x + xX = 0

The solution to this equation could not be determined.