2b^3-4b^2=30b

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Solution for 2b^3-4b^2=30b equation:


Simplifying
2b3 + -4b2 = 30b

Reorder the terms:
-4b2 + 2b3 = 30b

Solving
-4b2 + 2b3 = 30b

Solving for variable 'b'.

Reorder the terms:
-30b + -4b2 + 2b3 = 30b + -30b

Combine like terms: 30b + -30b = 0
-30b + -4b2 + 2b3 = 0

Factor out the Greatest Common Factor (GCF), '2b'.
2b(-15 + -2b + b2) = 0

Factor a trinomial.
2b((-3 + -1b)(5 + -1b)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 'b' equal to zero and attempt to solve: Simplifying b = 0 Solving b = 0 Move all terms containing b to the left, all other terms to the right. Simplifying b = 0

Subproblem 2

Set the factor '(-3 + -1b)' equal to zero and attempt to solve: Simplifying -3 + -1b = 0 Solving -3 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1b = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1b = 0 + 3 -1b = 0 + 3 Combine like terms: 0 + 3 = 3 -1b = 3 Divide each side by '-1'. b = -3 Simplifying b = -3

Subproblem 3

Set the factor '(5 + -1b)' equal to zero and attempt to solve: Simplifying 5 + -1b = 0 Solving 5 + -1b = 0 Move all terms containing b to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1b = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1b = 0 + -5 -1b = 0 + -5 Combine like terms: 0 + -5 = -5 -1b = -5 Divide each side by '-1'. b = 5 Simplifying b = 5

Solution

b = {0, -3, 5}

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