(-8y)(3y-4)+6y-5=

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Solution for (-8y)(3y-4)+6y-5= equation:


Simplifying
(-8y)(3y + -4) + 6y + -5 = 0

Remove parenthesis around (-8y)
-8y(3y + -4) + 6y + -5 = 0

Reorder the terms:
-8y(-4 + 3y) + 6y + -5 = 0
(-4 * -8y + 3y * -8y) + 6y + -5 = 0
(32y + -24y2) + 6y + -5 = 0

Reorder the terms:
-5 + 32y + 6y + -24y2 = 0

Combine like terms: 32y + 6y = 38y
-5 + 38y + -24y2 = 0

Solving
-5 + 38y + -24y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-24 the coefficient of the squared term: 

Divide each side by '-24'.
0.2083333333 + -1.583333333y + y2 = 0

Move the constant term to the right:

Add '-0.2083333333' to each side of the equation.
0.2083333333 + -1.583333333y + -0.2083333333 + y2 = 0 + -0.2083333333

Reorder the terms:
0.2083333333 + -0.2083333333 + -1.583333333y + y2 = 0 + -0.2083333333

Combine like terms: 0.2083333333 + -0.2083333333 = 0.0000000000
0.0000000000 + -1.583333333y + y2 = 0 + -0.2083333333
-1.583333333y + y2 = 0 + -0.2083333333

Combine like terms: 0 + -0.2083333333 = -0.2083333333
-1.583333333y + y2 = -0.2083333333

The y term is -1.583333333y.  Take half its coefficient (-0.7916666665).
Square it (0.6267361108) and add it to both sides.

Add '0.6267361108' to each side of the equation.
-1.583333333y + 0.6267361108 + y2 = -0.2083333333 + 0.6267361108

Reorder the terms:
0.6267361108 + -1.583333333y + y2 = -0.2083333333 + 0.6267361108

Combine like terms: -0.2083333333 + 0.6267361108 = 0.4184027775
0.6267361108 + -1.583333333y + y2 = 0.4184027775

Factor a perfect square on the left side:
(y + -0.7916666665)(y + -0.7916666665) = 0.4184027775

Calculate the square root of the right side: 0.646840612

Break this problem into two subproblems by setting 
(y + -0.7916666665) equal to 0.646840612 and -0.646840612.

Subproblem 1

y + -0.7916666665 = 0.646840612 Simplifying y + -0.7916666665 = 0.646840612 Reorder the terms: -0.7916666665 + y = 0.646840612 Solving -0.7916666665 + y = 0.646840612 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.7916666665' to each side of the equation. -0.7916666665 + 0.7916666665 + y = 0.646840612 + 0.7916666665 Combine like terms: -0.7916666665 + 0.7916666665 = 0.0000000000 0.0000000000 + y = 0.646840612 + 0.7916666665 y = 0.646840612 + 0.7916666665 Combine like terms: 0.646840612 + 0.7916666665 = 1.4385072785 y = 1.4385072785 Simplifying y = 1.4385072785

Subproblem 2

y + -0.7916666665 = -0.646840612 Simplifying y + -0.7916666665 = -0.646840612 Reorder the terms: -0.7916666665 + y = -0.646840612 Solving -0.7916666665 + y = -0.646840612 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.7916666665' to each side of the equation. -0.7916666665 + 0.7916666665 + y = -0.646840612 + 0.7916666665 Combine like terms: -0.7916666665 + 0.7916666665 = 0.0000000000 0.0000000000 + y = -0.646840612 + 0.7916666665 y = -0.646840612 + 0.7916666665 Combine like terms: -0.646840612 + 0.7916666665 = 0.1448260545 y = 0.1448260545 Simplifying y = 0.1448260545

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.4385072785, 0.1448260545}

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