y^2=6y+7

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Solution for y^2=6y+7 equation:


Simplifying
y2 = 6y + 7

Reorder the terms:
y2 = 7 + 6y

Solving
y2 = 7 + 6y

Solving for variable 'y'.

Reorder the terms:
-7 + -6y + y2 = 7 + 6y + -7 + -6y

Reorder the terms:
-7 + -6y + y2 = 7 + -7 + 6y + -6y

Combine like terms: 7 + -7 = 0
-7 + -6y + y2 = 0 + 6y + -6y
-7 + -6y + y2 = 6y + -6y

Combine like terms: 6y + -6y = 0
-7 + -6y + 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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