9y^2-36y-134=0

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Solution for 9y^2-36y-134=0 equation:


Simplifying
9y2 + -36y + -134 = 0

Reorder the terms:
-134 + -36y + 9y2 = 0

Solving
-134 + -36y + 9y2 = 0

Solving for variable 'y'.

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

Divide each side by '9'.
-14.88888889 + -4y + y2 = 0

Move the constant term to the right:

Add '14.88888889' to each side of the equation.
-14.88888889 + -4y + 14.88888889 + y2 = 0 + 14.88888889

Reorder the terms:
-14.88888889 + 14.88888889 + -4y + y2 = 0 + 14.88888889

Combine like terms: -14.88888889 + 14.88888889 = 0.00000000
0.00000000 + -4y + y2 = 0 + 14.88888889
-4y + y2 = 0 + 14.88888889

Combine like terms: 0 + 14.88888889 = 14.88888889
-4y + y2 = 14.88888889

The y term is -4y.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4y + 4 + y2 = 14.88888889 + 4

Reorder the terms:
4 + -4y + y2 = 14.88888889 + 4

Combine like terms: 14.88888889 + 4 = 18.88888889
4 + -4y + y2 = 18.88888889

Factor a perfect square on the left side:
(y + -2)(y + -2) = 18.88888889

Calculate the square root of the right side: 4.346134937

Break this problem into two subproblems by setting 
(y + -2) equal to 4.346134937 and -4.346134937.

Subproblem 1

y + -2 = 4.346134937 Simplifying y + -2 = 4.346134937 Reorder the terms: -2 + y = 4.346134937 Solving -2 + y = 4.346134937 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = 4.346134937 + 2 Combine like terms: -2 + 2 = 0 0 + y = 4.346134937 + 2 y = 4.346134937 + 2 Combine like terms: 4.346134937 + 2 = 6.346134937 y = 6.346134937 Simplifying y = 6.346134937

Subproblem 2

y + -2 = -4.346134937 Simplifying y + -2 = -4.346134937 Reorder the terms: -2 + y = -4.346134937 Solving -2 + y = -4.346134937 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = -4.346134937 + 2 Combine like terms: -2 + 2 = 0 0 + y = -4.346134937 + 2 y = -4.346134937 + 2 Combine like terms: -4.346134937 + 2 = -2.346134937 y = -2.346134937 Simplifying y = -2.346134937

Solution

The solution to the problem is based on the solutions from the subproblems. y = {6.346134937, -2.346134937}

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