-3x^2-12x=-15

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


Simplifying
-3x2 + -12x = -15

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

Solving
-12x + -3x2 = -15

Solving for variable 'x'.

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

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

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

Factor a trinomial.
3((1 + -1x)(5 + x)) = 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 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 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 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Solution

x = {1, -5}

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