y^2+2y=80

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Solution for y^2+2y=80 equation:


Simplifying
y2 + 2y = 80

Reorder the terms:
2y + y2 = 80

Solving
2y + y2 = 80

Solving for variable 'y'.

Reorder the terms:
-80 + 2y + y2 = 80 + -80

Combine like terms: 80 + -80 = 0
-80 + 2y + y2 = 0

Factor a trinomial.
(-10 + -1y)(8 + -1y) = 0

Subproblem 1

Set the factor '(-10 + -1y)' equal to zero and attempt to solve: Simplifying -10 + -1y = 0 Solving -10 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + -1y = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1y = 0 + 10 -1y = 0 + 10 Combine like terms: 0 + 10 = 10 -1y = 10 Divide each side by '-1'. y = -10 Simplifying y = -10

Subproblem 2

Set the factor '(8 + -1y)' equal to zero and attempt to solve: Simplifying 8 + -1y = 0 Solving 8 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1y = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1y = 0 + -8 -1y = 0 + -8 Combine like terms: 0 + -8 = -8 -1y = -8 Divide each side by '-1'. y = 8 Simplifying y = 8

Solution

y = {-10, 8}

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