18y^3-21y^2-30y=0

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Solution for 18y^3-21y^2-30y=0 equation:


Simplifying
18y3 + -21y2 + -30y = 0

Reorder the terms:
-30y + -21y2 + 18y3 = 0

Solving
-30y + -21y2 + 18y3 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '3y'.
3y(-10 + -7y + 6y2) = 0

Factor a trinomial.
3y((-5 + -6y)(2 + -1y)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(-5 + -6y)' equal to zero and attempt to solve: Simplifying -5 + -6y = 0 Solving -5 + -6y = 0 Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -6y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -6y = 0 + 5 -6y = 0 + 5 Combine like terms: 0 + 5 = 5 -6y = 5 Divide each side by '-6'. y = -0.8333333333 Simplifying y = -0.8333333333

Subproblem 3

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

Solution

y = {0, -0.8333333333, 2}

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