(5y-7)(4+y)=0

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Solution for (5y-7)(4+y)=0 equation:


Simplifying
(5y + -7)(4 + y) = 0

Reorder the terms:
(-7 + 5y)(4 + y) = 0

Multiply (-7 + 5y) * (4 + y)
(-7(4 + y) + 5y * (4 + y)) = 0
((4 * -7 + y * -7) + 5y * (4 + y)) = 0
((-28 + -7y) + 5y * (4 + y)) = 0
(-28 + -7y + (4 * 5y + y * 5y)) = 0
(-28 + -7y + (20y + 5y2)) = 0

Combine like terms: -7y + 20y = 13y
(-28 + 13y + 5y2) = 0

Solving
-28 + 13y + 5y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-4 + -1y)(7 + -5y) = 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 '(7 + -5y)' equal to zero and attempt to solve: Simplifying 7 + -5y = 0 Solving 7 + -5y = 0 Move all terms containing y to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -5y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5y = 0 + -7 -5y = 0 + -7 Combine like terms: 0 + -7 = -7 -5y = -7 Divide each side by '-5'. y = 1.4 Simplifying y = 1.4

Solution

y = {-4, 1.4}

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