20y^4+13y^3-21y^2=0

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Solution for 20y^4+13y^3-21y^2=0 equation:


Simplifying
20y4 + 13y3 + -21y2 = 0

Reorder the terms:
-21y2 + 13y3 + 20y4 = 0

Solving
-21y2 + 13y3 + 20y4 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), 'y2'.
y2(-21 + 13y + 20y2) = 0

Factor a trinomial.
y2((-7 + -5y)(3 + -4y)) = 0

Subproblem 1

Set the factor 'y2' equal to zero and attempt to solve: Simplifying y2 = 0 Solving y2 = 0 Move all terms containing y to the left, all other terms to the right. Simplifying y2 = 0 Take the square root of each side: 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 + -4y)' equal to zero and attempt to solve: Simplifying 3 + -4y = 0 Solving 3 + -4y = 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 + -4y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4y = 0 + -3 -4y = 0 + -3 Combine like terms: 0 + -3 = -3 -4y = -3 Divide each side by '-4'. y = 0.75 Simplifying y = 0.75

Solution

y = {0, -1.4, 0.75}

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