15x+5x^2=4x+12

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Solution for 15x+5x^2=4x+12 equation:


Simplifying
15x + 5x2 = 4x + 12

Reorder the terms:
15x + 5x2 = 12 + 4x

Solving
15x + 5x2 = 12 + 4x

Solving for variable 'x'.

Reorder the terms:
-12 + 15x + -4x + 5x2 = 12 + 4x + -12 + -4x

Combine like terms: 15x + -4x = 11x
-12 + 11x + 5x2 = 12 + 4x + -12 + -4x

Reorder the terms:
-12 + 11x + 5x2 = 12 + -12 + 4x + -4x

Combine like terms: 12 + -12 = 0
-12 + 11x + 5x2 = 0 + 4x + -4x
-12 + 11x + 5x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-12 + 11x + 5x2 = 0

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

Subproblem 1

Set the factor '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(4 + -5x)' equal to zero and attempt to solve: Simplifying 4 + -5x = 0 Solving 4 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -5x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5x = 0 + -4 -5x = 0 + -4 Combine like terms: 0 + -4 = -4 -5x = -4 Divide each side by '-5'. x = 0.8 Simplifying x = 0.8

Solution

x = {-3, 0.8}

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