-5x^2-28x=15

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Solution for -5x^2-28x=15 equation:


Simplifying
-5x2 + -28x = 15

Reorder the terms:
-28x + -5x2 = 15

Solving
-28x + -5x2 = 15

Solving for variable 'x'.

Reorder the terms:
-15 + -28x + -5x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-15 + -28x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(15 + 28x + 5x2) = 0

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

Ignore the factor -1.

Subproblem 1

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

Subproblem 2

Set the factor '(3 + 5x)' equal to zero and attempt to solve: Simplifying 3 + 5x = 0 Solving 3 + 5x = 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 + 5x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 5x = 0 + -3 5x = 0 + -3 Combine like terms: 0 + -3 = -3 5x = -3 Divide each side by '5'. x = -0.6 Simplifying x = -0.6

Solution

x = {-5, -0.6}

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