(3y-3)(y+4)=

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Solution for (3y-3)(y+4)= equation:


Simplifying
(3y + -3)(y + 4) = 0

Reorder the terms:
(-3 + 3y)(y + 4) = 0

Reorder the terms:
(-3 + 3y)(4 + y) = 0

Multiply (-3 + 3y) * (4 + y)
(-3(4 + y) + 3y * (4 + y)) = 0
((4 * -3 + y * -3) + 3y * (4 + y)) = 0
((-12 + -3y) + 3y * (4 + y)) = 0
(-12 + -3y + (4 * 3y + y * 3y)) = 0
(-12 + -3y + (12y + 3y2)) = 0

Combine like terms: -3y + 12y = 9y
(-12 + 9y + 3y2) = 0

Solving
-12 + 9y + 3y2 = 0

Solving for variable 'y'.

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

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

Ignore the factor 3.

Subproblem 1

Set the factor '(-4 + -1y)' equal to zero and attempt to solve: Simplifying -4 + -1y = 0 Solving -4 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1y = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1y = 0 + 4 -1y = 0 + 4 Combine like terms: 0 + 4 = 4 -1y = 4 Divide each side by '-1'. y = -4 Simplifying y = -4

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 = {-4, 1}

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