2y^2+5y-9=y^2+2y+1

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Solution for 2y^2+5y-9=y^2+2y+1 equation:


Simplifying
2y2 + 5y + -9 = y2 + 2y + 1

Reorder the terms:
-9 + 5y + 2y2 = y2 + 2y + 1

Reorder the terms:
-9 + 5y + 2y2 = 1 + 2y + y2

Solving
-9 + 5y + 2y2 = 1 + 2y + y2

Solving for variable 'y'.

Reorder the terms:
-9 + -1 + 5y + -2y + 2y2 + -1y2 = 1 + 2y + y2 + -1 + -2y + -1y2

Combine like terms: -9 + -1 = -10
-10 + 5y + -2y + 2y2 + -1y2 = 1 + 2y + y2 + -1 + -2y + -1y2

Combine like terms: 5y + -2y = 3y
-10 + 3y + 2y2 + -1y2 = 1 + 2y + y2 + -1 + -2y + -1y2

Combine like terms: 2y2 + -1y2 = 1y2
-10 + 3y + 1y2 = 1 + 2y + y2 + -1 + -2y + -1y2

Reorder the terms:
-10 + 3y + 1y2 = 1 + -1 + 2y + -2y + y2 + -1y2

Combine like terms: 1 + -1 = 0
-10 + 3y + 1y2 = 0 + 2y + -2y + y2 + -1y2
-10 + 3y + 1y2 = 2y + -2y + y2 + -1y2

Combine like terms: 2y + -2y = 0
-10 + 3y + 1y2 = 0 + y2 + -1y2
-10 + 3y + 1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-10 + 3y + 1y2 = 0

Factor a trinomial.
(-5 + -1y)(2 + -1y) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(2 + -1y)' equal to zero and attempt to solve: Simplifying 2 + -1y = 0 Solving 2 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1y = 0 + -2 -1y = 0 + -2 Combine like terms: 0 + -2 = -2 -1y = -2 Divide each side by '-1'. y = 2 Simplifying y = 2

Solution

y = {-5, 2}

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