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

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


Simplifying
4y(2y + -3) + -5(2 + -1y) = 0

Reorder the terms:
4y(-3 + 2y) + -5(2 + -1y) = 0
(-3 * 4y + 2y * 4y) + -5(2 + -1y) = 0
(-12y + 8y2) + -5(2 + -1y) = 0
-12y + 8y2 + (2 * -5 + -1y * -5) = 0
-12y + 8y2 + (-10 + 5y) = 0

Reorder the terms:
-10 + -12y + 5y + 8y2 = 0

Combine like terms: -12y + 5y = -7y
-10 + -7y + 8y2 = 0

Solving
-10 + -7y + 8y2 = 0

Solving for variable 'y'.

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

Divide each side by '8'.
-1.25 + -0.875y + y2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + -0.875y + 1.25 + y2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + -0.875y + y2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + -0.875y + y2 = 0 + 1.25
-0.875y + y2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
-0.875y + y2 = 1.25

The y term is -0.875y.  Take half its coefficient (-0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
-0.875y + 0.19140625 + y2 = 1.25 + 0.19140625

Reorder the terms:
0.19140625 + -0.875y + y2 = 1.25 + 0.19140625

Combine like terms: 1.25 + 0.19140625 = 1.44140625
0.19140625 + -0.875y + y2 = 1.44140625

Factor a perfect square on the left side:
(y + -0.4375)(y + -0.4375) = 1.44140625

Calculate the square root of the right side: 1.200585795

Break this problem into two subproblems by setting 
(y + -0.4375) equal to 1.200585795 and -1.200585795.

Subproblem 1

y + -0.4375 = 1.200585795 Simplifying y + -0.4375 = 1.200585795 Reorder the terms: -0.4375 + y = 1.200585795 Solving -0.4375 + y = 1.200585795 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + y = 1.200585795 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + y = 1.200585795 + 0.4375 y = 1.200585795 + 0.4375 Combine like terms: 1.200585795 + 0.4375 = 1.638085795 y = 1.638085795 Simplifying y = 1.638085795

Subproblem 2

y + -0.4375 = -1.200585795 Simplifying y + -0.4375 = -1.200585795 Reorder the terms: -0.4375 + y = -1.200585795 Solving -0.4375 + y = -1.200585795 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.4375' to each side of the equation. -0.4375 + 0.4375 + y = -1.200585795 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + y = -1.200585795 + 0.4375 y = -1.200585795 + 0.4375 Combine like terms: -1.200585795 + 0.4375 = -0.763085795 y = -0.763085795 Simplifying y = -0.763085795

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.638085795, -0.763085795}

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