(5y^2-4y)+(2y^2+6y-9)=

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Solution for (5y^2-4y)+(2y^2+6y-9)= equation:


Simplifying
(5y2 + -4y) + (2y2 + 6y + -9) = 0

Reorder the terms:
(-4y + 5y2) + (2y2 + 6y + -9) = 0

Remove parenthesis around (-4y + 5y2)
-4y + 5y2 + (2y2 + 6y + -9) = 0

Reorder the terms:
-4y + 5y2 + (-9 + 6y + 2y2) = 0

Remove parenthesis around (-9 + 6y + 2y2)
-4y + 5y2 + -9 + 6y + 2y2 = 0

Reorder the terms:
-9 + -4y + 6y + 5y2 + 2y2 = 0

Combine like terms: -4y + 6y = 2y
-9 + 2y + 5y2 + 2y2 = 0

Combine like terms: 5y2 + 2y2 = 7y2
-9 + 2y + 7y2 = 0

Solving
-9 + 2y + 7y2 = 0

Solving for variable 'y'.

Factor a trinomial.
(-9 + -7y)(1 + -1y) = 0

Subproblem 1

Set the factor '(-9 + -7y)' equal to zero and attempt to solve: Simplifying -9 + -7y = 0 Solving -9 + -7y = 0 Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -7y = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -7y = 0 + 9 -7y = 0 + 9 Combine like terms: 0 + 9 = 9 -7y = 9 Divide each side by '-7'. y = -1.285714286 Simplifying y = -1.285714286

Subproblem 2

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

Solution

y = {-1.285714286, 1}

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