84=3x^2-18x+108

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Solution for 84=3x^2-18x+108 equation:


Simplifying
84 = 3x2 + -18x + 108

Reorder the terms:
84 = 108 + -18x + 3x2

Solving
84 = 108 + -18x + 3x2

Solving for variable 'x'.

Combine like terms: 84 + -108 = -24
-24 + 18x + -3x2 = 108 + -18x + 3x2 + -108 + 18x + -3x2

Reorder the terms:
-24 + 18x + -3x2 = 108 + -108 + -18x + 18x + 3x2 + -3x2

Combine like terms: 108 + -108 = 0
-24 + 18x + -3x2 = 0 + -18x + 18x + 3x2 + -3x2
-24 + 18x + -3x2 = -18x + 18x + 3x2 + -3x2

Combine like terms: -18x + 18x = 0
-24 + 18x + -3x2 = 0 + 3x2 + -3x2
-24 + 18x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-24 + 18x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-8 + 6x + -1x2) = 0

Factor a trinomial.
3((-4 + x)(2 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-4 + x)' equal to zero and attempt to solve: Simplifying -4 + x = 0 Solving -4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + x = 0 + 4 x = 0 + 4 Combine like terms: 0 + 4 = 4 x = 4 Simplifying x = 4

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {4, 2}

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