-2(5y-1)-y=-4y(y-3)

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Solution for -2(5y-1)-y=-4y(y-3) equation:


Simplifying
-2(5y + -1) + -1y = -4y(y + -3)

Reorder the terms:
-2(-1 + 5y) + -1y = -4y(y + -3)
(-1 * -2 + 5y * -2) + -1y = -4y(y + -3)
(2 + -10y) + -1y = -4y(y + -3)

Combine like terms: -10y + -1y = -11y
2 + -11y = -4y(y + -3)

Reorder the terms:
2 + -11y = -4y(-3 + y)
2 + -11y = (-3 * -4y + y * -4y)
2 + -11y = (12y + -4y2)

Solving
2 + -11y = 12y + -4y2

Solving for variable 'y'.

Combine like terms: -11y + -12y = -23y
2 + -23y + 4y2 = 12y + -4y2 + -12y + 4y2

Reorder the terms:
2 + -23y + 4y2 = 12y + -12y + -4y2 + 4y2

Combine like terms: 12y + -12y = 0
2 + -23y + 4y2 = 0 + -4y2 + 4y2
2 + -23y + 4y2 = -4y2 + 4y2

Combine like terms: -4y2 + 4y2 = 0
2 + -23y + 4y2 = 0

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

Divide each side by '4'.
0.5 + -5.75y + y2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -5.75y + -0.5 + y2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + -5.75y + y2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -5.75y + y2 = 0 + -0.5
-5.75y + y2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
-5.75y + y2 = -0.5

The y term is -5.75y.  Take half its coefficient (-2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
-5.75y + 8.265625 + y2 = -0.5 + 8.265625

Reorder the terms:
8.265625 + -5.75y + y2 = -0.5 + 8.265625

Combine like terms: -0.5 + 8.265625 = 7.765625
8.265625 + -5.75y + y2 = 7.765625

Factor a perfect square on the left side:
(y + -2.875)(y + -2.875) = 7.765625

Calculate the square root of the right side: 2.786687101

Break this problem into two subproblems by setting 
(y + -2.875) equal to 2.786687101 and -2.786687101.

Subproblem 1

y + -2.875 = 2.786687101 Simplifying y + -2.875 = 2.786687101 Reorder the terms: -2.875 + y = 2.786687101 Solving -2.875 + y = 2.786687101 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + y = 2.786687101 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + y = 2.786687101 + 2.875 y = 2.786687101 + 2.875 Combine like terms: 2.786687101 + 2.875 = 5.661687101 y = 5.661687101 Simplifying y = 5.661687101

Subproblem 2

y + -2.875 = -2.786687101 Simplifying y + -2.875 = -2.786687101 Reorder the terms: -2.875 + y = -2.786687101 Solving -2.875 + y = -2.786687101 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + y = -2.786687101 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + y = -2.786687101 + 2.875 y = -2.786687101 + 2.875 Combine like terms: -2.786687101 + 2.875 = 0.088312899 y = 0.088312899 Simplifying y = 0.088312899

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.661687101, 0.088312899}

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