x^2-6x+9+x^2=225

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Solution for x^2-6x+9+x^2=225 equation:


Simplifying
x2 + -6x + 9 + x2 = 225

Reorder the terms:
9 + -6x + x2 + x2 = 225

Combine like terms: x2 + x2 = 2x2
9 + -6x + 2x2 = 225

Solving
9 + -6x + 2x2 = 225

Solving for variable 'x'.

Reorder the terms:
9 + -225 + -6x + 2x2 = 225 + -225

Combine like terms: 9 + -225 = -216
-216 + -6x + 2x2 = 225 + -225

Combine like terms: 225 + -225 = 0
-216 + -6x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-108 + -3x + x2) = 0

Factor a trinomial.
2((-9 + -1x)(12 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

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

Subproblem 2

Set the factor '(12 + -1x)' equal to zero and attempt to solve: Simplifying 12 + -1x = 0 Solving 12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1x = 0 + -12 -1x = 0 + -12 Combine like terms: 0 + -12 = -12 -1x = -12 Divide each side by '-1'. x = 12 Simplifying x = 12

Solution

x = {-9, 12}

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