2y^2-4y-8+y^2-y=0

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Solution for 2y^2-4y-8+y^2-y=0 equation:


Simplifying
2y2 + -4y + -8 + y2 + -1y = 0

Reorder the terms:
-8 + -4y + -1y + 2y2 + y2 = 0

Combine like terms: -4y + -1y = -5y
-8 + -5y + 2y2 + y2 = 0

Combine like terms: 2y2 + y2 = 3y2
-8 + -5y + 3y2 = 0

Solving
-8 + -5y + 3y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-1 + -1y)(8 + -3y) = 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 '(8 + -3y)' equal to zero and attempt to solve: Simplifying 8 + -3y = 0 Solving 8 + -3y = 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 + -3y = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3y = 0 + -8 -3y = 0 + -8 Combine like terms: 0 + -8 = -8 -3y = -8 Divide each side by '-3'. y = 2.666666667 Simplifying y = 2.666666667

Solution

y = {-1, 2.666666667}

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