-8x^3-42x^2=10x

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Solution for -8x^3-42x^2=10x equation:


Simplifying
-8x3 + -42x2 = 10x

Reorder the terms:
-42x2 + -8x3 = 10x

Solving
-42x2 + -8x3 = 10x

Solving for variable 'x'.

Reorder the terms:
-10x + -42x2 + -8x3 = 10x + -10x

Combine like terms: 10x + -10x = 0
-10x + -42x2 + -8x3 = 0

Factor out the Greatest Common Factor (GCF), '-2x'.
-2x(5 + 21x + 4x2) = 0

Factor a trinomial.
-2x((5 + x)(1 + 4x)) = 0

Ignore the factor -2.

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 + 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

Subproblem 3

Set the factor '(1 + 4x)' equal to zero and attempt to solve: Simplifying 1 + 4x = 0 Solving 1 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 4x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 4x = 0 + -1 4x = 0 + -1 Combine like terms: 0 + -1 = -1 4x = -1 Divide each side by '4'. x = -0.25 Simplifying x = -0.25

Solution

x = {0, -5, -0.25}

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