4y(y+7)-72=0

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Solution for 4y(y+7)-72=0 equation:


Simplifying
4y(y + 7) + -72 = 0

Reorder the terms:
4y(7 + y) + -72 = 0
(7 * 4y + y * 4y) + -72 = 0
(28y + 4y2) + -72 = 0

Reorder the terms:
-72 + 28y + 4y2 = 0

Solving
-72 + 28y + 4y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-18 + 7y + y2) = 0

Factor a trinomial.
4((-9 + -1y)(2 + -1y)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-9 + -1y)' equal to zero and attempt to solve: Simplifying -9 + -1y = 0 Solving -9 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1y = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1y = 0 + 9 -1y = 0 + 9 Combine like terms: 0 + 9 = 9 -1y = 9 Divide each side by '-1'. y = -9 Simplifying y = -9

Subproblem 2

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

Solution

y = {-9, 2}

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