0=4x^3+25x^2-56x

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Solution for 0=4x^3+25x^2-56x equation:


Simplifying
0 = 4x3 + 25x2 + -56x

Reorder the terms:
0 = -56x + 25x2 + 4x3

Solving
0 = -56x + 25x2 + 4x3

Solving for variable 'x'.
Remove the zero:
56x + -25x2 + -4x3 = -56x + 25x2 + 4x3 + 56x + -25x2 + -4x3

Reorder the terms:
56x + -25x2 + -4x3 = -56x + 56x + 25x2 + -25x2 + 4x3 + -4x3

Combine like terms: -56x + 56x = 0
56x + -25x2 + -4x3 = 0 + 25x2 + -25x2 + 4x3 + -4x3
56x + -25x2 + -4x3 = 25x2 + -25x2 + 4x3 + -4x3

Combine like terms: 25x2 + -25x2 = 0
56x + -25x2 + -4x3 = 0 + 4x3 + -4x3
56x + -25x2 + -4x3 = 4x3 + -4x3

Combine like terms: 4x3 + -4x3 = 0
56x + -25x2 + -4x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(56 + -25x + -4x2) = 0

Factor a trinomial.
x((7 + -4x)(8 + x)) = 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 '(7 + -4x)' equal to zero and attempt to solve: Simplifying 7 + -4x = 0 Solving 7 + -4x = 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 + -4x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4x = 0 + -7 -4x = 0 + -7 Combine like terms: 0 + -7 = -7 -4x = -7 Divide each side by '-4'. x = 1.75 Simplifying x = 1.75

Subproblem 3

Set the factor '(8 + x)' equal to zero and attempt to solve: Simplifying 8 + x = 0 Solving 8 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + x = 0 + -8 x = 0 + -8 Combine like terms: 0 + -8 = -8 x = -8 Simplifying x = -8

Solution

x = {0, 1.75, -8}

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