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

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


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

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

Multiply (4 + y) * (-5 + 4y)
(4(-5 + 4y) + y(-5 + 4y)) = 0
((-5 * 4 + 4y * 4) + y(-5 + 4y)) = 0
((-20 + 16y) + y(-5 + 4y)) = 0
(-20 + 16y + (-5 * y + 4y * y)) = 0
(-20 + 16y + (-5y + 4y2)) = 0

Combine like terms: 16y + -5y = 11y
(-20 + 11y + 4y2) = 0

Solving
-20 + 11y + 4y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-4 + -1y)(5 + -4y) = 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 '(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 = {-4, 1.25}

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