12x^2+15x=18

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Solution for 12x^2+15x=18 equation:


Simplifying
12x2 + 15x = 18

Reorder the terms:
15x + 12x2 = 18

Solving
15x + 12x2 = 18

Solving for variable 'x'.

Reorder the terms:
-18 + 15x + 12x2 = 18 + -18

Combine like terms: 18 + -18 = 0
-18 + 15x + 12x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-6 + 5x + 4x2) = 0

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

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(3 + -4x)' equal to zero and attempt to solve: Simplifying 3 + -4x = 0 Solving 3 + -4x = 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 + -4x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4x = 0 + -3 -4x = 0 + -3 Combine like terms: 0 + -3 = -3 -4x = -3 Divide each side by '-4'. x = 0.75 Simplifying x = 0.75

Solution

x = {-2, 0.75}

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