(4y+8)(y-4)=0

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Solution for (4y+8)(y-4)=0 equation: 


Simplifying
(4y + 8)(y + -4) = 0

Reorder the terms:
(8 + 4y)(y + -4) = 0

Reorder the terms:
(8 + 4y)(-4 + y) = 0

Multiply (8 + 4y) * (-4 + y)
(8(-4 + y) + 4y * (-4 + y)) = 0
((-4 * 8 + y * 8) + 4y * (-4 + y)) = 0
((-32 + 8y) + 4y * (-4 + y)) = 0
(-32 + 8y + (-4 * 4y + y * 4y)) = 0
(-32 + 8y + (-16y + 4y2)) = 0

Combine like terms: 8y + -16y = -8y
(-32 + -8y + 4y2) = 0

Solving
-32 + -8y + 4y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-8 + -2y + y2) = 0

Factor a trinomial.
4((-2 + -1y)(4 + -1y)) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(-2 + -1y)' equal to zero and attempt to solve:

Simplifying
-2 + -1y = 0

Solving
-2 + -1y = 0

Move all terms containing y to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1y = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1y = 0 + 2
-1y = 0 + 2

Combine like terms: 0 + 2 = 2
-1y = 2

Divide each side by '-1'.
y = -2

Simplifying
y = -2

Subproblem 2
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
Solution
y = {-2, 4}

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