10y^3-16y^2-42y=

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Solution for 10y^3-16y^2-42y= equation:


Simplifying
10y3 + -16y2 + -42y = 0

Reorder the terms:
-42y + -16y2 + 10y3 = 0

Solving
-42y + -16y2 + 10y3 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '2y'.
2y(-21 + -8y + 5y2) = 0

Factor a trinomial.
2y((-7 + -5y)(3 + -1y)) = 0

Ignore the factor 2.

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 '(-7 + -5y)' equal to zero and attempt to solve: Simplifying -7 + -5y = 0 Solving -7 + -5y = 0 Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -5y = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -5y = 0 + 7 -5y = 0 + 7 Combine like terms: 0 + 7 = 7 -5y = 7 Divide each side by '-5'. y = -1.4 Simplifying y = -1.4

Subproblem 3

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

Solution

y = {0, -1.4, 3}

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