4y^2=7y+15

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Solution for 4y^2=7y+15 equation:


Simplifying
4y2 = 7y + 15

Reorder the terms:
4y2 = 15 + 7y

Solving
4y2 = 15 + 7y

Solving for variable 'y'.

Reorder the terms:
-15 + -7y + 4y2 = 15 + 7y + -15 + -7y

Reorder the terms:
-15 + -7y + 4y2 = 15 + -15 + 7y + -7y

Combine like terms: 15 + -15 = 0
-15 + -7y + 4y2 = 0 + 7y + -7y
-15 + -7y + 4y2 = 7y + -7y

Combine like terms: 7y + -7y = 0
-15 + -7y + 4y2 = 0

Factor a trinomial.
(-5 + -4y)(3 + -1y) = 0

Subproblem 1

Set the factor '(-5 + -4y)' equal to zero and attempt to solve: Simplifying -5 + -4y = 0 Solving -5 + -4y = 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 + -4y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4y = 0 + 5 -4y = 0 + 5 Combine like terms: 0 + 5 = 5 -4y = 5 Divide each side by '-4'. y = -1.25 Simplifying y = -1.25

Subproblem 2

Set the factor '(3 + -1y)' equal to zero and attempt to solve: Simplifying 3 + -1y = 0 Solving 3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1y = 0 + -3 -1y = 0 + -3 Combine like terms: 0 + -3 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3

Solution

y = {-1.25, 3}

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