0=8x^3-72x^2+112x

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Solution for 0=8x^3-72x^2+112x equation:


Simplifying
0 = 8x3 + -72x2 + 112x

Reorder the terms:
0 = 112x + -72x2 + 8x3

Solving
0 = 112x + -72x2 + 8x3

Solving for variable 'x'.
Remove the zero:
-112x + 72x2 + -8x3 = 112x + -72x2 + 8x3 + -112x + 72x2 + -8x3

Reorder the terms:
-112x + 72x2 + -8x3 = 112x + -112x + -72x2 + 72x2 + 8x3 + -8x3

Combine like terms: 112x + -112x = 0
-112x + 72x2 + -8x3 = 0 + -72x2 + 72x2 + 8x3 + -8x3
-112x + 72x2 + -8x3 = -72x2 + 72x2 + 8x3 + -8x3

Combine like terms: -72x2 + 72x2 = 0
-112x + 72x2 + -8x3 = 0 + 8x3 + -8x3
-112x + 72x2 + -8x3 = 8x3 + -8x3

Combine like terms: 8x3 + -8x3 = 0
-112x + 72x2 + -8x3 = 0

Factor out the Greatest Common Factor (GCF), '8x'.
8x(-14 + 9x + -1x2) = 0

Factor a trinomial.
8x((-7 + x)(2 + -1x)) = 0

Ignore the factor 8.

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 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {0, 7, 2}

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