x^2-100=(x+10)(x-10)

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Solution for x^2-100=(x+10)(x-10) equation:


Simplifying
x2 + -100 = (x + 10)(x + -10)

Reorder the terms:
-100 + x2 = (x + 10)(x + -10)

Reorder the terms:
-100 + x2 = (10 + x)(x + -10)

Reorder the terms:
-100 + x2 = (10 + x)(-10 + x)

Multiply (10 + x) * (-10 + x)
-100 + x2 = (10(-10 + x) + x(-10 + x))
-100 + x2 = ((-10 * 10 + x * 10) + x(-10 + x))
-100 + x2 = ((-100 + 10x) + x(-10 + x))
-100 + x2 = (-100 + 10x + (-10 * x + x * x))
-100 + x2 = (-100 + 10x + (-10x + x2))

Combine like terms: 10x + -10x = 0
-100 + x2 = (-100 + 0 + x2)
-100 + x2 = (-100 + x2)

Add '100' to each side of the equation.
-100 + 100 + x2 = -100 + 100 + x2

Combine like terms: -100 + 100 = 0
0 + x2 = -100 + 100 + x2
x2 = -100 + 100 + x2

Combine like terms: -100 + 100 = 0
x2 = 0 + x2
x2 = x2

Add '-1x2' to each side of the equation.
x2 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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