y(y)-8y=-7

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Solution for y(y)-8y=-7 equation:


Simplifying
y(y) + -8y = -7

Multiply y * y
y2 + -8y = -7

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

Solving
-8y + y2 = -7

Solving for variable 'y'.

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

Combine like terms: -7 + 7 = 0
7 + -8y + y2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

y = {1, 7}

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