15x^2-54x=216

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Solution for 15x^2-54x=216 equation:


Simplifying
15x2 + -54x = 216

Reorder the terms:
-54x + 15x2 = 216

Solving
-54x + 15x2 = 216

Solving for variable 'x'.

Reorder the terms:
-216 + -54x + 15x2 = 216 + -216

Combine like terms: 216 + -216 = 0
-216 + -54x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-72 + -18x + 5x2) = 0

Factor a trinomial.
3((-12 + -5x)(6 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-12 + -5x)' equal to zero and attempt to solve: Simplifying -12 + -5x = 0 Solving -12 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -5x = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -5x = 0 + 12 -5x = 0 + 12 Combine like terms: 0 + 12 = 12 -5x = 12 Divide each side by '-5'. x = -2.4 Simplifying x = -2.4

Subproblem 2

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

Solution

x = {-2.4, 6}

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