11y(4-6y)+5(13y+1)=9

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Solution for 11y(4-6y)+5(13y+1)=9 equation:


Simplifying
11y(4 + -6y) + 5(13y + 1) = 9
(4 * 11y + -6y * 11y) + 5(13y + 1) = 9
(44y + -66y2) + 5(13y + 1) = 9

Reorder the terms:
44y + -66y2 + 5(1 + 13y) = 9
44y + -66y2 + (1 * 5 + 13y * 5) = 9
44y + -66y2 + (5 + 65y) = 9

Reorder the terms:
5 + 44y + 65y + -66y2 = 9

Combine like terms: 44y + 65y = 109y
5 + 109y + -66y2 = 9

Solving
5 + 109y + -66y2 = 9

Solving for variable 'y'.

Reorder the terms:
5 + -9 + 109y + -66y2 = 9 + -9

Combine like terms: 5 + -9 = -4
-4 + 109y + -66y2 = 9 + -9

Combine like terms: 9 + -9 = 0
-4 + 109y + -66y2 = 0

Begin completing the square.  Divide all terms by
-66 the coefficient of the squared term: 

Divide each side by '-66'.
0.06060606061 + -1.651515152y + y2 = 0

Move the constant term to the right:

Add '-0.06060606061' to each side of the equation.
0.06060606061 + -1.651515152y + -0.06060606061 + y2 = 0 + -0.06060606061

Reorder the terms:
0.06060606061 + -0.06060606061 + -1.651515152y + y2 = 0 + -0.06060606061

Combine like terms: 0.06060606061 + -0.06060606061 = 0.00000000000
0.00000000000 + -1.651515152y + y2 = 0 + -0.06060606061
-1.651515152y + y2 = 0 + -0.06060606061

Combine like terms: 0 + -0.06060606061 = -0.06060606061
-1.651515152y + y2 = -0.06060606061

The y term is -1.651515152y.  Take half its coefficient (-0.825757576).
Square it (0.6818755743) and add it to both sides.

Add '0.6818755743' to each side of the equation.
-1.651515152y + 0.6818755743 + y2 = -0.06060606061 + 0.6818755743

Reorder the terms:
0.6818755743 + -1.651515152y + y2 = -0.06060606061 + 0.6818755743

Combine like terms: -0.06060606061 + 0.6818755743 = 0.62126951369
0.6818755743 + -1.651515152y + y2 = 0.62126951369

Factor a perfect square on the left side:
(y + -0.825757576)(y + -0.825757576) = 0.62126951369

Calculate the square root of the right side: 0.788206517

Break this problem into two subproblems by setting 
(y + -0.825757576) equal to 0.788206517 and -0.788206517.

Subproblem 1

y + -0.825757576 = 0.788206517 Simplifying y + -0.825757576 = 0.788206517 Reorder the terms: -0.825757576 + y = 0.788206517 Solving -0.825757576 + y = 0.788206517 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.825757576' to each side of the equation. -0.825757576 + 0.825757576 + y = 0.788206517 + 0.825757576 Combine like terms: -0.825757576 + 0.825757576 = 0.000000000 0.000000000 + y = 0.788206517 + 0.825757576 y = 0.788206517 + 0.825757576 Combine like terms: 0.788206517 + 0.825757576 = 1.613964093 y = 1.613964093 Simplifying y = 1.613964093

Subproblem 2

y + -0.825757576 = -0.788206517 Simplifying y + -0.825757576 = -0.788206517 Reorder the terms: -0.825757576 + y = -0.788206517 Solving -0.825757576 + y = -0.788206517 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.825757576' to each side of the equation. -0.825757576 + 0.825757576 + y = -0.788206517 + 0.825757576 Combine like terms: -0.825757576 + 0.825757576 = 0.000000000 0.000000000 + y = -0.788206517 + 0.825757576 y = -0.788206517 + 0.825757576 Combine like terms: -0.788206517 + 0.825757576 = 0.037551059 y = 0.037551059 Simplifying y = 0.037551059

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.613964093, 0.037551059}

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