3y^2=-7y+40

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Solution for 3y^2=-7y+40 equation:


Simplifying
3y2 = -7y + 40

Reorder the terms:
3y2 = 40 + -7y

Solving
3y2 = 40 + -7y

Solving for variable 'y'.

Reorder the terms:
-40 + 7y + 3y2 = 40 + -7y + -40 + 7y

Reorder the terms:
-40 + 7y + 3y2 = 40 + -40 + -7y + 7y

Combine like terms: 40 + -40 = 0
-40 + 7y + 3y2 = 0 + -7y + 7y
-40 + 7y + 3y2 = -7y + 7y

Combine like terms: -7y + 7y = 0
-40 + 7y + 3y2 = 0

Factor a trinomial.
(-5 + -1y)(8 + -3y) = 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 '(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 = {-5, 2.666666667}

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