x^2+(x-6)(x-6)=90

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Solution for x^2+(x-6)(x-6)=90 equation:


Simplifying
x2 + (x + -6)(x + -6) = 90

Reorder the terms:
x2 + (-6 + x)(x + -6) = 90

Reorder the terms:
x2 + (-6 + x)(-6 + x) = 90

Multiply (-6 + x) * (-6 + x)
x2 + (-6(-6 + x) + x(-6 + x)) = 90
x2 + ((-6 * -6 + x * -6) + x(-6 + x)) = 90
x2 + ((36 + -6x) + x(-6 + x)) = 90
x2 + (36 + -6x + (-6 * x + x * x)) = 90
x2 + (36 + -6x + (-6x + x2)) = 90

Combine like terms: -6x + -6x = -12x
x2 + (36 + -12x + x2) = 90

Reorder the terms:
36 + -12x + x2 + x2 = 90

Combine like terms: x2 + x2 = 2x2
36 + -12x + 2x2 = 90

Solving
36 + -12x + 2x2 = 90

Solving for variable 'x'.

Reorder the terms:
36 + -90 + -12x + 2x2 = 90 + -90

Combine like terms: 36 + -90 = -54
-54 + -12x + 2x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-54 + -12x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-27 + -6x + x2) = 0

Factor a trinomial.
2((-3 + -1x)(9 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {-3, 9}

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