2y(y-0.5)=23.5

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Solution for 2y(y-0.5)=23.5 equation:


Simplifying
2y(y + -0.5) = 23.5

Reorder the terms:
2y(-0.5 + y) = 23.5
(-0.5 * 2y + y * 2y) = 23.5
(-1y + 2y2) = 23.5

Solving
-1y + 2y2 = 23.5

Solving for variable 'y'.

Reorder the terms:
-23.5 + -1y + 2y2 = 23.5 + -23.5

Combine like terms: 23.5 + -23.5 = 0.0
-23.5 + -1y + 2y2 = 0.0

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

Divide each side by '2'.
-11.75 + -0.5y + y2 = 0.0

Move the constant term to the right:

Add '11.75' to each side of the equation.
-11.75 + -0.5y + 11.75 + y2 = 0.0 + 11.75

Reorder the terms:
-11.75 + 11.75 + -0.5y + y2 = 0.0 + 11.75

Combine like terms: -11.75 + 11.75 = 0.00
0.00 + -0.5y + y2 = 0.0 + 11.75
-0.5y + y2 = 0.0 + 11.75

Combine like terms: 0.0 + 11.75 = 11.75
-0.5y + y2 = 11.75

The y term is -0.5y.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5y + 0.0625 + y2 = 11.75 + 0.0625

Reorder the terms:
0.0625 + -0.5y + y2 = 11.75 + 0.0625

Combine like terms: 11.75 + 0.0625 = 11.8125
0.0625 + -0.5y + y2 = 11.8125

Factor a perfect square on the left side:
(y + -0.25)(y + -0.25) = 11.8125

Calculate the square root of the right side: 3.436931771

Break this problem into two subproblems by setting 
(y + -0.25) equal to 3.436931771 and -3.436931771.

Subproblem 1

y + -0.25 = 3.436931771 Simplifying y + -0.25 = 3.436931771 Reorder the terms: -0.25 + y = 3.436931771 Solving -0.25 + y = 3.436931771 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + y = 3.436931771 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = 3.436931771 + 0.25 y = 3.436931771 + 0.25 Combine like terms: 3.436931771 + 0.25 = 3.686931771 y = 3.686931771 Simplifying y = 3.686931771

Subproblem 2

y + -0.25 = -3.436931771 Simplifying y + -0.25 = -3.436931771 Reorder the terms: -0.25 + y = -3.436931771 Solving -0.25 + y = -3.436931771 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + y = -3.436931771 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + y = -3.436931771 + 0.25 y = -3.436931771 + 0.25 Combine like terms: -3.436931771 + 0.25 = -3.186931771 y = -3.186931771 Simplifying y = -3.186931771

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.686931771, -3.186931771}

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