(y+5)(9y-9)=0

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Solution for (y+5)(9y-9)=0 equation:


Simplifying
(y + 5)(9y + -9) = 0

Reorder the terms:
(5 + y)(9y + -9) = 0

Reorder the terms:
(5 + y)(-9 + 9y) = 0

Multiply (5 + y) * (-9 + 9y)
(5(-9 + 9y) + y(-9 + 9y)) = 0
((-9 * 5 + 9y * 5) + y(-9 + 9y)) = 0
((-45 + 45y) + y(-9 + 9y)) = 0
(-45 + 45y + (-9 * y + 9y * y)) = 0
(-45 + 45y + (-9y + 9y2)) = 0

Combine like terms: 45y + -9y = 36y
(-45 + 36y + 9y2) = 0

Solving
-45 + 36y + 9y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '9'.
9(-5 + 4y + y2) = 0

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

Ignore the factor 9.

Subproblem 1

Set the factor '(-5 + -1y)' equal to zero and attempt to solve: Simplifying -5 + -1y = 0 Solving -5 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1y = 0 + 5 -1y = 0 + 5 Combine like terms: 0 + 5 = 5 -1y = 5 Divide each side by '-1'. y = -5 Simplifying y = -5

Subproblem 2

Set the factor '(1 + -1y)' equal to zero and attempt to solve: Simplifying 1 + -1y = 0 Solving 1 + -1y = 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 + -1y = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1y = 0 + -1 -1y = 0 + -1 Combine like terms: 0 + -1 = -1 -1y = -1 Divide each side by '-1'. y = 1 Simplifying y = 1

Solution

y = {-5, 1}

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