4x+5+2x^2-12x+21=180

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Solution for 4x+5+2x^2-12x+21=180 equation:


Simplifying
4x + 5 + 2x2 + -12x + 21 = 180

Reorder the terms:
5 + 21 + 4x + -12x + 2x2 = 180

Combine like terms: 5 + 21 = 26
26 + 4x + -12x + 2x2 = 180

Combine like terms: 4x + -12x = -8x
26 + -8x + 2x2 = 180

Solving
26 + -8x + 2x2 = 180

Solving for variable 'x'.

Reorder the terms:
26 + -180 + -8x + 2x2 = 180 + -180

Combine like terms: 26 + -180 = -154
-154 + -8x + 2x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-154 + -8x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-77 + -4x + x2) = 0

Factor a trinomial.
2((-7 + -1x)(11 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(11 + -1x)' equal to zero and attempt to solve: Simplifying 11 + -1x = 0 Solving 11 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + -1x = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -1x = 0 + -11 -1x = 0 + -11 Combine like terms: 0 + -11 = -11 -1x = -11 Divide each side by '-1'. x = 11 Simplifying x = 11

Solution

x = {-7, 11}

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