2x^3+5x^2=42x

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Solution for 2x^3+5x^2=42x equation:


Simplifying
2x3 + 5x2 = 42x

Reorder the terms:
5x2 + 2x3 = 42x

Solving
5x2 + 2x3 = 42x

Solving for variable 'x'.

Reorder the terms:
-42x + 5x2 + 2x3 = 42x + -42x

Combine like terms: 42x + -42x = 0
-42x + 5x2 + 2x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-42 + 5x + 2x2) = 0

Factor a trinomial.
x((-6 + -1x)(7 + -2x)) = 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 '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 3

Set the factor '(7 + -2x)' equal to zero and attempt to solve: Simplifying 7 + -2x = 0 Solving 7 + -2x = 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 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5

Solution

x = {0, -6, 3.5}

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