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

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


Simplifying
(4y + -5)(4 + -1y) = 0

Reorder the terms:
(-5 + 4y)(4 + -1y) = 0

Multiply (-5 + 4y) * (4 + -1y)
(-5(4 + -1y) + 4y * (4 + -1y)) = 0
((4 * -5 + -1y * -5) + 4y * (4 + -1y)) = 0
((-20 + 5y) + 4y * (4 + -1y)) = 0
(-20 + 5y + (4 * 4y + -1y * 4y)) = 0
(-20 + 5y + (16y + -4y2)) = 0

Combine like terms: 5y + 16y = 21y
(-20 + 21y + -4y2) = 0

Solving
-20 + 21y + -4y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-4 + y)(5 + -4y) = 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 '(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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