8y^2-41y-594=0

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Solution for 8y^2-41y-594=0 equation:


Simplifying
8y2 + -41y + -594 = 0

Reorder the terms:
-594 + -41y + 8y2 = 0

Solving
-594 + -41y + 8y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
-74.25 + -5.125y + y2 = 0

Move the constant term to the right:

Add '74.25' to each side of the equation.
-74.25 + -5.125y + 74.25 + y2 = 0 + 74.25

Reorder the terms:
-74.25 + 74.25 + -5.125y + y2 = 0 + 74.25

Combine like terms: -74.25 + 74.25 = 0.00
0.00 + -5.125y + y2 = 0 + 74.25
-5.125y + y2 = 0 + 74.25

Combine like terms: 0 + 74.25 = 74.25
-5.125y + y2 = 74.25

The y term is -5.125y.  Take half its coefficient (-2.5625).
Square it (6.56640625) and add it to both sides.

Add '6.56640625' to each side of the equation.
-5.125y + 6.56640625 + y2 = 74.25 + 6.56640625

Reorder the terms:
6.56640625 + -5.125y + y2 = 74.25 + 6.56640625

Combine like terms: 74.25 + 6.56640625 = 80.81640625
6.56640625 + -5.125y + y2 = 80.81640625

Factor a perfect square on the left side:
(y + -2.5625)(y + -2.5625) = 80.81640625

Calculate the square root of the right side: 8.989794561

Break this problem into two subproblems by setting 
(y + -2.5625) equal to 8.989794561 and -8.989794561.

Subproblem 1

y + -2.5625 = 8.989794561 Simplifying y + -2.5625 = 8.989794561 Reorder the terms: -2.5625 + y = 8.989794561 Solving -2.5625 + y = 8.989794561 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.5625' to each side of the equation. -2.5625 + 2.5625 + y = 8.989794561 + 2.5625 Combine like terms: -2.5625 + 2.5625 = 0.0000 0.0000 + y = 8.989794561 + 2.5625 y = 8.989794561 + 2.5625 Combine like terms: 8.989794561 + 2.5625 = 11.552294561 y = 11.552294561 Simplifying y = 11.552294561

Subproblem 2

y + -2.5625 = -8.989794561 Simplifying y + -2.5625 = -8.989794561 Reorder the terms: -2.5625 + y = -8.989794561 Solving -2.5625 + y = -8.989794561 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.5625' to each side of the equation. -2.5625 + 2.5625 + y = -8.989794561 + 2.5625 Combine like terms: -2.5625 + 2.5625 = 0.0000 0.0000 + y = -8.989794561 + 2.5625 y = -8.989794561 + 2.5625 Combine like terms: -8.989794561 + 2.5625 = -6.427294561 y = -6.427294561 Simplifying y = -6.427294561

Solution

The solution to the problem is based on the solutions from the subproblems. y = {11.552294561, -6.427294561}

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