15x^2-24x-9=3

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Solution for 15x^2-24x-9=3 equation:


Simplifying
15x2 + -24x + -9 = 3

Reorder the terms:
-9 + -24x + 15x2 = 3

Solving
-9 + -24x + 15x2 = 3

Solving for variable 'x'.

Reorder the terms:
-9 + -3 + -24x + 15x2 = 3 + -3

Combine like terms: -9 + -3 = -12
-12 + -24x + 15x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-12 + -24x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-4 + -8x + 5x2) = 0

Factor a trinomial.
3((-2 + -5x)(2 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -5x)' equal to zero and attempt to solve: Simplifying -2 + -5x = 0 Solving -2 + -5x = 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 + -5x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5x = 0 + 2 -5x = 0 + 2 Combine like terms: 0 + 2 = 2 -5x = 2 Divide each side by '-5'. x = -0.4 Simplifying x = -0.4

Subproblem 2

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

Solution

x = {-0.4, 2}

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