0=x^3+2x^2-15x

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Solution for 0=x^3+2x^2-15x equation:


Simplifying
0 = x3 + 2x2 + -15x

Reorder the terms:
0 = -15x + 2x2 + x3

Solving
0 = -15x + 2x2 + x3

Solving for variable 'x'.
Remove the zero:
15x + -2x2 + -1x3 = -15x + 2x2 + x3 + 15x + -2x2 + -1x3

Reorder the terms:
15x + -2x2 + -1x3 = -15x + 15x + 2x2 + -2x2 + x3 + -1x3

Combine like terms: -15x + 15x = 0
15x + -2x2 + -1x3 = 0 + 2x2 + -2x2 + x3 + -1x3
15x + -2x2 + -1x3 = 2x2 + -2x2 + x3 + -1x3

Combine like terms: 2x2 + -2x2 = 0
15x + -2x2 + -1x3 = 0 + x3 + -1x3
15x + -2x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
15x + -2x2 + -1x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(15 + -2x + -1x2) = 0

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

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

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

Subproblem 3

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

Solution

x = {0, 3, -5}

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