(5y+9)(4+y)=0

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Solution for (5y+9)(4+y)=0 equation:


Simplifying
(5y + 9)(4 + y) = 0

Reorder the terms:
(9 + 5y)(4 + y) = 0

Multiply (9 + 5y) * (4 + y)
(9(4 + y) + 5y * (4 + y)) = 0
((4 * 9 + y * 9) + 5y * (4 + y)) = 0
((36 + 9y) + 5y * (4 + y)) = 0
(36 + 9y + (4 * 5y + y * 5y)) = 0
(36 + 9y + (20y + 5y2)) = 0

Combine like terms: 9y + 20y = 29y
(36 + 29y + 5y2) = 0

Solving
36 + 29y + 5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(4 + y)(9 + 5y) = 0

Subproblem 1

Set the factor '(4 + y)' equal to zero and attempt to solve: Simplifying 4 + y = 0 Solving 4 + y = 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 + y = 0 + -4 Combine like terms: 4 + -4 = 0 0 + y = 0 + -4 y = 0 + -4 Combine like terms: 0 + -4 = -4 y = -4 Simplifying y = -4

Subproblem 2

Set the factor '(9 + 5y)' equal to zero and attempt to solve: Simplifying 9 + 5y = 0 Solving 9 + 5y = 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 + 5y = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 5y = 0 + -9 5y = 0 + -9 Combine like terms: 0 + -9 = -9 5y = -9 Divide each side by '5'. y = -1.8 Simplifying y = -1.8

Solution

y = {-4, -1.8}

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