(3y-3)(y+5)=

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Solution for (3y-3)(y+5)= equation:


Simplifying
(3y + -3)(y + 5) = 0

Reorder the terms:
(-3 + 3y)(y + 5) = 0

Reorder the terms:
(-3 + 3y)(5 + y) = 0

Multiply (-3 + 3y) * (5 + y)
(-3(5 + y) + 3y * (5 + y)) = 0
((5 * -3 + y * -3) + 3y * (5 + y)) = 0
((-15 + -3y) + 3y * (5 + y)) = 0
(-15 + -3y + (5 * 3y + y * 3y)) = 0
(-15 + -3y + (15y + 3y2)) = 0

Combine like terms: -3y + 15y = 12y
(-15 + 12y + 3y2) = 0

Solving
-15 + 12y + 3y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + 4y + y2) = 0

Factor a trinomial.
3((-5 + -1y)(1 + -1y)) = 0

Ignore the factor 3.

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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