y^2+8y=65

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Solution for y^2+8y=65 equation:


Simplifying
y2 + 8y = 65

Reorder the terms:
8y + y2 = 65

Solving
8y + y2 = 65

Solving for variable 'y'.

Reorder the terms:
-65 + 8y + y2 = 65 + -65

Combine like terms: 65 + -65 = 0
-65 + 8y + y2 = 0

Factor a trinomial.
(-13 + -1y)(5 + -1y) = 0

Subproblem 1

Set the factor '(-13 + -1y)' equal to zero and attempt to solve: Simplifying -13 + -1y = 0 Solving -13 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -1y = 0 + 13 Combine like terms: -13 + 13 = 0 0 + -1y = 0 + 13 -1y = 0 + 13 Combine like terms: 0 + 13 = 13 -1y = 13 Divide each side by '-1'. y = -13 Simplifying y = -13

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 = {-13, 5}

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