(3+y)(4y-5)=0

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Solution for (3+y)(4y-5)=0 equation:


Simplifying
(3 + y)(4y + -5) = 0

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

Multiply (3 + y) * (-5 + 4y)
(3(-5 + 4y) + y(-5 + 4y)) = 0
((-5 * 3 + 4y * 3) + y(-5 + 4y)) = 0
((-15 + 12y) + y(-5 + 4y)) = 0
(-15 + 12y + (-5 * y + 4y * y)) = 0
(-15 + 12y + (-5y + 4y2)) = 0

Combine like terms: 12y + -5y = 7y
(-15 + 7y + 4y2) = 0

Solving
-15 + 7y + 4y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-3 + -1y)(5 + -4y) = 0

Subproblem 1

Set the factor '(-3 + -1y)' equal to zero and attempt to solve: Simplifying -3 + -1y = 0 Solving -3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1y = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1y = 0 + 3 -1y = 0 + 3 Combine like terms: 0 + 3 = 3 -1y = 3 Divide each side by '-1'. y = -3 Simplifying y = -3

Subproblem 2

Set the factor '(5 + -4y)' equal to zero and attempt to solve: Simplifying 5 + -4y = 0 Solving 5 + -4y = 0 Move all terms containing y to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4y = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4y = 0 + -5 -4y = 0 + -5 Combine like terms: 0 + -5 = -5 -4y = -5 Divide each side by '-4'. y = 1.25 Simplifying y = 1.25

Solution

y = {-3, 1.25}

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