y^2+-2y+-8=7

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Solution for y^2+-2y+-8=7 equation:


Simplifying
y2 + -2y + -8 = 7

Reorder the terms:
-8 + -2y + y2 = 7

Solving
-8 + -2y + y2 = 7

Solving for variable 'y'.

Reorder the terms:
-8 + -7 + -2y + y2 = 7 + -7

Combine like terms: -8 + -7 = -15
-15 + -2y + y2 = 7 + -7

Combine like terms: 7 + -7 = 0
-15 + -2y + y2 = 0

Factor a trinomial.
(-3 + -1y)(5 + -1y) = 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 + -1y)' equal to zero and attempt to solve: Simplifying 5 + -1y = 0 Solving 5 + -1y = 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 + -1y = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1y = 0 + -5 -1y = 0 + -5 Combine like terms: 0 + -5 = -5 -1y = -5 Divide each side by '-1'. y = 5 Simplifying y = 5

Solution

y = {-3, 5}

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