5*x*x+2x-15x-6=0

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Solution for 5*x*x+2x-15x-6=0 equation:


Simplifying
5x * x + 2x + -15x + -6 = 0

Multiply x * x
5x2 + 2x + -15x + -6 = 0

Reorder the terms:
-6 + 2x + -15x + 5x2 = 0

Combine like terms: 2x + -15x = -13x
-6 + -13x + 5x2 = 0

Solving
-6 + -13x + 5x2 = 0

Solving for variable 'x'.

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

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 '(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

Solution

x = {-0.4, 3}

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