4x^3+28x^2=-8x^2-56x

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Solution for 4x^3+28x^2=-8x^2-56x equation:


Simplifying
4x3 + 28x2 = -8x2 + -56x

Reorder the terms:
28x2 + 4x3 = -8x2 + -56x

Reorder the terms:
28x2 + 4x3 = -56x + -8x2

Solving
28x2 + 4x3 = -56x + -8x2

Solving for variable 'x'.

Reorder the terms:
56x + 28x2 + 8x2 + 4x3 = -56x + -8x2 + 56x + 8x2

Combine like terms: 28x2 + 8x2 = 36x2
56x + 36x2 + 4x3 = -56x + -8x2 + 56x + 8x2

Reorder the terms:
56x + 36x2 + 4x3 = -56x + 56x + -8x2 + 8x2

Combine like terms: -56x + 56x = 0
56x + 36x2 + 4x3 = 0 + -8x2 + 8x2
56x + 36x2 + 4x3 = -8x2 + 8x2

Combine like terms: -8x2 + 8x2 = 0
56x + 36x2 + 4x3 = 0

Factor out the Greatest Common Factor (GCF), '4x'.
4x(14 + 9x + x2) = 0

Factor a trinomial.
4x((7 + x)(2 + x)) = 0

Ignore the factor 4.

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 '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Subproblem 3

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 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 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {0, -7, -2}

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