x^3=11x^2-28x

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Solution for x^3=11x^2-28x equation:


Simplifying
x3 = 11x2 + -28x

Reorder the terms:
x3 = -28x + 11x2

Solving
x3 = -28x + 11x2

Solving for variable 'x'.

Reorder the terms:
28x + -11x2 + x3 = -28x + 11x2 + 28x + -11x2

Reorder the terms:
28x + -11x2 + x3 = -28x + 28x + 11x2 + -11x2

Combine like terms: -28x + 28x = 0
28x + -11x2 + x3 = 0 + 11x2 + -11x2
28x + -11x2 + x3 = 11x2 + -11x2

Combine like terms: 11x2 + -11x2 = 0
28x + -11x2 + x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(28 + -11x + x2) = 0

Factor a trinomial.
x((4 + -1x)(7 + -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 '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Subproblem 3

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {0, 4, 7}

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