-y^2+3y=9y+9

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Solution for -y^2+3y=9y+9 equation:


Simplifying
-1y2 + 3y = 9y + 9

Reorder the terms:
3y + -1y2 = 9y + 9

Reorder the terms:
3y + -1y2 = 9 + 9y

Solving
3y + -1y2 = 9 + 9y

Solving for variable 'y'.

Reorder the terms:
-9 + 3y + -9y + -1y2 = 9 + 9y + -9 + -9y

Combine like terms: 3y + -9y = -6y
-9 + -6y + -1y2 = 9 + 9y + -9 + -9y

Reorder the terms:
-9 + -6y + -1y2 = 9 + -9 + 9y + -9y

Combine like terms: 9 + -9 = 0
-9 + -6y + -1y2 = 0 + 9y + -9y
-9 + -6y + -1y2 = 9y + -9y

Combine like terms: 9y + -9y = 0
-9 + -6y + -1y2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(9 + 6y + y2) = 0

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

Ignore the factor -1.

Subproblem 1

Set the factor '(3 + y)' equal to zero and attempt to solve: Simplifying 3 + y = 0 Solving 3 + y = 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 + y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + y = 0 + -3 y = 0 + -3 Combine like terms: 0 + -3 = -3 y = -3 Simplifying y = -3

Subproblem 2

Set the factor '(3 + y)' equal to zero and attempt to solve: Simplifying 3 + y = 0 Solving 3 + y = 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 + y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + y = 0 + -3 y = 0 + -3 Combine like terms: 0 + -3 = -3 y = -3 Simplifying y = -3

Solution

y = {-3, -3}

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