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

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


Simplifying
(y + 5)(7 + -1y) = 0

Reorder the terms:
(5 + y)(7 + -1y) = 0

Multiply (5 + y) * (7 + -1y)
(5(7 + -1y) + y(7 + -1y)) = 0
((7 * 5 + -1y * 5) + y(7 + -1y)) = 0
((35 + -5y) + y(7 + -1y)) = 0
(35 + -5y + (7 * y + -1y * y)) = 0
(35 + -5y + (7y + -1y2)) = 0

Combine like terms: -5y + 7y = 2y
(35 + 2y + -1y2) = 0

Solving
35 + 2y + -1y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(7 + -1y)(5 + y) = 0

Subproblem 1

Set the factor '(7 + -1y)' equal to zero and attempt to solve: Simplifying 7 + -1y = 0 Solving 7 + -1y = 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 + -1y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1y = 0 + -7 -1y = 0 + -7 Combine like terms: 0 + -7 = -7 -1y = -7 Divide each side by '-1'. y = 7 Simplifying y = 7

Subproblem 2

Set the factor '(5 + y)' equal to zero and attempt to solve: Simplifying 5 + y = 0 Solving 5 + y = 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 + y = 0 + -5 Combine like terms: 5 + -5 = 0 0 + y = 0 + -5 y = 0 + -5 Combine like terms: 0 + -5 = -5 y = -5 Simplifying y = -5

Solution

y = {7, -5}

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