4y=5y^2-9

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Solution for 4y=5y^2-9 equation:


Simplifying
4y = 5y2 + -9

Reorder the terms:
4y = -9 + 5y2

Solving
4y = -9 + 5y2

Solving for variable 'y'.

Reorder the terms:
9 + 4y + -5y2 = -9 + 5y2 + 9 + -5y2

Reorder the terms:
9 + 4y + -5y2 = -9 + 9 + 5y2 + -5y2

Combine like terms: -9 + 9 = 0
9 + 4y + -5y2 = 0 + 5y2 + -5y2
9 + 4y + -5y2 = 5y2 + -5y2

Combine like terms: 5y2 + -5y2 = 0
9 + 4y + -5y2 = 0

Factor a trinomial.
(9 + -5y)(1 + y) = 0

Subproblem 1

Set the factor '(9 + -5y)' equal to zero and attempt to solve: Simplifying 9 + -5y = 0 Solving 9 + -5y = 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 + -5y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5y = 0 + -9 -5y = 0 + -9 Combine like terms: 0 + -9 = -9 -5y = -9 Divide each side by '-5'. y = 1.8 Simplifying y = 1.8

Subproblem 2

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

Solution

y = {1.8, -1}

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