12=18x^2-84x+102

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Solution for 12=18x^2-84x+102 equation:


Simplifying
12 = 18x2 + -84x + 102

Reorder the terms:
12 = 102 + -84x + 18x2

Solving
12 = 102 + -84x + 18x2

Solving for variable 'x'.

Combine like terms: 12 + -102 = -90
-90 + 84x + -18x2 = 102 + -84x + 18x2 + -102 + 84x + -18x2

Reorder the terms:
-90 + 84x + -18x2 = 102 + -102 + -84x + 84x + 18x2 + -18x2

Combine like terms: 102 + -102 = 0
-90 + 84x + -18x2 = 0 + -84x + 84x + 18x2 + -18x2
-90 + 84x + -18x2 = -84x + 84x + 18x2 + -18x2

Combine like terms: -84x + 84x = 0
-90 + 84x + -18x2 = 0 + 18x2 + -18x2
-90 + 84x + -18x2 = 18x2 + -18x2

Combine like terms: 18x2 + -18x2 = 0
-90 + 84x + -18x2 = 0

Factor out the Greatest Common Factor (GCF), '6'.
6(-15 + 14x + -3x2) = 0

Factor a trinomial.
6((-3 + x)(5 + -3x)) = 0

Ignore the factor 6.

Subproblem 1

Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 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 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Simplifying x = 3

Subproblem 2

Set the factor '(5 + -3x)' equal to zero and attempt to solve: Simplifying 5 + -3x = 0 Solving 5 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -3x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3x = 0 + -5 -3x = 0 + -5 Combine like terms: 0 + -5 = -5 -3x = -5 Divide each side by '-3'. x = 1.666666667 Simplifying x = 1.666666667

Solution

x = {3, 1.666666667}

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