15x^2+87x=18

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Solution for 15x^2+87x=18 equation:


Simplifying
15x2 + 87x = 18

Reorder the terms:
87x + 15x2 = 18

Solving
87x + 15x2 = 18

Solving for variable 'x'.

Reorder the terms:
-18 + 87x + 15x2 = 18 + -18

Combine like terms: 18 + -18 = 0
-18 + 87x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-6 + 29x + 5x2) = 0

Factor a trinomial.
3((-6 + -1x)(1 + -5x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 2

Set the factor '(1 + -5x)' equal to zero and attempt to solve: Simplifying 1 + -5x = 0 Solving 1 + -5x = 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 + -5x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5x = 0 + -1 -5x = 0 + -1 Combine like terms: 0 + -1 = -1 -5x = -1 Divide each side by '-5'. x = 0.2 Simplifying x = 0.2

Solution

x = {-6, 0.2}

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