12x^2=3x+15

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Solution for 12x^2=3x+15 equation:


Simplifying
12x2 = 3x + 15

Reorder the terms:
12x2 = 15 + 3x

Solving
12x2 = 15 + 3x

Solving for variable 'x'.

Reorder the terms:
-15 + -3x + 12x2 = 15 + 3x + -15 + -3x

Reorder the terms:
-15 + -3x + 12x2 = 15 + -15 + 3x + -3x

Combine like terms: 15 + -15 = 0
-15 + -3x + 12x2 = 0 + 3x + -3x
-15 + -3x + 12x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-15 + -3x + 12x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + -1x + 4x2) = 0

Factor a trinomial.
3((-1 + -1x)(5 + -4x)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(5 + -4x)' equal to zero and attempt to solve: Simplifying 5 + -4x = 0 Solving 5 + -4x = 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 + -4x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4x = 0 + -5 -4x = 0 + -5 Combine like terms: 0 + -5 = -5 -4x = -5 Divide each side by '-4'. x = 1.25 Simplifying x = 1.25

Solution

x = {-1, 1.25}

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