0=5x^3-45x^2+40x

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Solution for 0=5x^3-45x^2+40x equation:


Simplifying
0 = 5x3 + -45x2 + 40x

Reorder the terms:
0 = 40x + -45x2 + 5x3

Solving
0 = 40x + -45x2 + 5x3

Solving for variable 'x'.
Remove the zero:
-40x + 45x2 + -5x3 = 40x + -45x2 + 5x3 + -40x + 45x2 + -5x3

Reorder the terms:
-40x + 45x2 + -5x3 = 40x + -40x + -45x2 + 45x2 + 5x3 + -5x3

Combine like terms: 40x + -40x = 0
-40x + 45x2 + -5x3 = 0 + -45x2 + 45x2 + 5x3 + -5x3
-40x + 45x2 + -5x3 = -45x2 + 45x2 + 5x3 + -5x3

Combine like terms: -45x2 + 45x2 = 0
-40x + 45x2 + -5x3 = 0 + 5x3 + -5x3
-40x + 45x2 + -5x3 = 5x3 + -5x3

Combine like terms: 5x3 + -5x3 = 0
-40x + 45x2 + -5x3 = 0

Factor out the Greatest Common Factor (GCF), '5x'.
5x(-8 + 9x + -1x2) = 0

Factor a trinomial.
5x((-8 + x)(1 + -1x)) = 0

Ignore the factor 5.

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 '(-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

Subproblem 3

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

Solution

x = {0, 8, 1}

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