(2y+9)(4-y)=0

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Solution for (2y+9)(4-y)=0 equation:


Simplifying
(2y + 9)(4 + -1y) = 0

Reorder the terms:
(9 + 2y)(4 + -1y) = 0

Multiply (9 + 2y) * (4 + -1y)
(9(4 + -1y) + 2y * (4 + -1y)) = 0
((4 * 9 + -1y * 9) + 2y * (4 + -1y)) = 0
((36 + -9y) + 2y * (4 + -1y)) = 0
(36 + -9y + (4 * 2y + -1y * 2y)) = 0
(36 + -9y + (8y + -2y2)) = 0

Combine like terms: -9y + 8y = -1y
(36 + -1y + -2y2) = 0

Solving
36 + -1y + -2y2 = 0

Solving for variable 'y'.

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

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 '(9 + 2y)' equal to zero and attempt to solve: Simplifying 9 + 2y = 0 Solving 9 + 2y = 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 + 2y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2y = 0 + -9 2y = 0 + -9 Combine like terms: 0 + -9 = -9 2y = -9 Divide each side by '2'. y = -4.5 Simplifying y = -4.5

Solution

y = {4, -4.5}

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