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

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


Simplifying
0 = -1x3 + -2x2 + 15x

Reorder the terms:
0 = 15x + -2x2 + -1x3

Solving
0 = 15x + -2x2 + -1x3

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

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

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

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

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

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

Factor a trinomial.
x((-5 + -1x)(3 + -1x)) = 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 '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 3

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, -5, 3}

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