9y=4y^2-9

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Solution for 9y=4y^2-9 equation:


Simplifying
9y = 4y2 + -9

Reorder the terms:
9y = -9 + 4y2

Solving
9y = -9 + 4y2

Solving for variable 'y'.

Reorder the terms:
9 + 9y + -4y2 = -9 + 4y2 + 9 + -4y2

Reorder the terms:
9 + 9y + -4y2 = -9 + 9 + 4y2 + -4y2

Combine like terms: -9 + 9 = 0
9 + 9y + -4y2 = 0 + 4y2 + -4y2
9 + 9y + -4y2 = 4y2 + -4y2

Combine like terms: 4y2 + -4y2 = 0
9 + 9y + -4y2 = 0

Factor a trinomial.
(3 + -1y)(3 + 4y) = 0

Subproblem 1

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

Subproblem 2

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 = {3, -0.75}

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