2(y^2-28)=-9y

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Solution for 2(y^2-28)=-9y equation:


Simplifying
2(y2 + -28) = -9y

Reorder the terms:
2(-28 + y2) = -9y
(-28 * 2 + y2 * 2) = -9y
(-56 + 2y2) = -9y

Solving
-56 + 2y2 = -9y

Solving for variable 'y'.

Reorder the terms:
-56 + 9y + 2y2 = -9y + 9y

Combine like terms: -9y + 9y = 0
-56 + 9y + 2y2 = 0

Factor a trinomial.
(-8 + -1y)(7 + -2y) = 0

Subproblem 1

Set the factor '(-8 + -1y)' equal to zero and attempt to solve: Simplifying -8 + -1y = 0 Solving -8 + -1y = 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 + -1y = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1y = 0 + 8 -1y = 0 + 8 Combine like terms: 0 + 8 = 8 -1y = 8 Divide each side by '-1'. y = -8 Simplifying y = -8

Subproblem 2

Set the factor '(7 + -2y)' equal to zero and attempt to solve: Simplifying 7 + -2y = 0 Solving 7 + -2y = 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 + -2y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2y = 0 + -7 -2y = 0 + -7 Combine like terms: 0 + -7 = -7 -2y = -7 Divide each side by '-2'. y = 3.5 Simplifying y = 3.5

Solution

y = {-8, 3.5}

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