32y(12-5y)=8+7y

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Solution for 32y(12-5y)=8+7y equation:


Simplifying
32y(12 + -5y) = 8 + 7y
(12 * 32y + -5y * 32y) = 8 + 7y
(384y + -160y2) = 8 + 7y

Solving
384y + -160y2 = 8 + 7y

Solving for variable 'y'.

Reorder the terms:
-8 + 384y + -7y + -160y2 = 8 + 7y + -8 + -7y

Combine like terms: 384y + -7y = 377y
-8 + 377y + -160y2 = 8 + 7y + -8 + -7y

Reorder the terms:
-8 + 377y + -160y2 = 8 + -8 + 7y + -7y

Combine like terms: 8 + -8 = 0
-8 + 377y + -160y2 = 0 + 7y + -7y
-8 + 377y + -160y2 = 7y + -7y

Combine like terms: 7y + -7y = 0
-8 + 377y + -160y2 = 0

Begin completing the square.  Divide all terms by
-160 the coefficient of the squared term: 

Divide each side by '-160'.
0.05 + -2.35625y + y2 = 0.0

Move the constant term to the right:

Add '-0.05' to each side of the equation.
0.05 + -2.35625y + -0.05 + y2 = 0.0 + -0.05

Reorder the terms:
0.05 + -0.05 + -2.35625y + y2 = 0.0 + -0.05

Combine like terms: 0.05 + -0.05 = 0.00
0.00 + -2.35625y + y2 = 0.0 + -0.05
-2.35625y + y2 = 0.0 + -0.05

Combine like terms: 0.0 + -0.05 = -0.05
-2.35625y + y2 = -0.05

The y term is -2.35625y.  Take half its coefficient (-1.178125).
Square it (1.387978516) and add it to both sides.

Add '1.387978516' to each side of the equation.
-2.35625y + 1.387978516 + y2 = -0.05 + 1.387978516

Reorder the terms:
1.387978516 + -2.35625y + y2 = -0.05 + 1.387978516

Combine like terms: -0.05 + 1.387978516 = 1.337978516
1.387978516 + -2.35625y + y2 = 1.337978516

Factor a perfect square on the left side:
(y + -1.178125)(y + -1.178125) = 1.337978516

Calculate the square root of the right side: 1.156710213

Break this problem into two subproblems by setting 
(y + -1.178125) equal to 1.156710213 and -1.156710213.

Subproblem 1

y + -1.178125 = 1.156710213 Simplifying y + -1.178125 = 1.156710213 Reorder the terms: -1.178125 + y = 1.156710213 Solving -1.178125 + y = 1.156710213 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.178125' to each side of the equation. -1.178125 + 1.178125 + y = 1.156710213 + 1.178125 Combine like terms: -1.178125 + 1.178125 = 0.000000 0.000000 + y = 1.156710213 + 1.178125 y = 1.156710213 + 1.178125 Combine like terms: 1.156710213 + 1.178125 = 2.334835213 y = 2.334835213 Simplifying y = 2.334835213

Subproblem 2

y + -1.178125 = -1.156710213 Simplifying y + -1.178125 = -1.156710213 Reorder the terms: -1.178125 + y = -1.156710213 Solving -1.178125 + y = -1.156710213 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.178125' to each side of the equation. -1.178125 + 1.178125 + y = -1.156710213 + 1.178125 Combine like terms: -1.178125 + 1.178125 = 0.000000 0.000000 + y = -1.156710213 + 1.178125 y = -1.156710213 + 1.178125 Combine like terms: -1.156710213 + 1.178125 = 0.021414787 y = 0.021414787 Simplifying y = 0.021414787

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.334835213, 0.021414787}

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