9y^4+77y^2-36=0

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Solution for 9y^4+77y^2-36=0 equation:


Simplifying
9y4 + 77y2 + -36 = 0

Reorder the terms:
-36 + 77y2 + 9y4 = 0

Solving
-36 + 77y2 + 9y4 = 0

Solving for variable 'y'.

Factor a trinomial.
(-9 + -1y2)(4 + -9y2) = 0

Factor a difference between two squares.
(-9 + -1y2)((2 + 3y)(2 + -3y)) = 0

Subproblem 1

Set the factor '(-9 + -1y2)' equal to zero and attempt to solve: Simplifying -9 + -1y2 = 0 Solving -9 + -1y2 = 0 Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1y2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1y2 = 0 + 9 -1y2 = 0 + 9 Combine like terms: 0 + 9 = 9 -1y2 = 9 Divide each side by '-1'. y2 = -9 Simplifying y2 = -9 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(2 + 3y)' equal to zero and attempt to solve: Simplifying 2 + 3y = 0 Solving 2 + 3y = 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 + 3y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3y = 0 + -2 3y = 0 + -2 Combine like terms: 0 + -2 = -2 3y = -2 Divide each side by '3'. y = -0.6666666667 Simplifying y = -0.6666666667

Subproblem 3

Set the factor '(2 + -3y)' equal to zero and attempt to solve: Simplifying 2 + -3y = 0 Solving 2 + -3y = 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 + -3y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -3y = 0 + -2 -3y = 0 + -2 Combine like terms: 0 + -2 = -2 -3y = -2 Divide each side by '-3'. y = 0.6666666667 Simplifying y = 0.6666666667

Solution

y = {-0.6666666667, 0.6666666667}

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