23y-y^2=2

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Solution for 23y-y^2=2 equation:


Simplifying
23y + -1y2 = 2

Solving
23y + -1y2 = 2

Solving for variable 'y'.

Reorder the terms:
-2 + 23y + -1y2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 23y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
2 + -23y + y2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -23y + -2 + y2 = 0 + -2

Reorder the terms:
2 + -2 + -23y + y2 = 0 + -2

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

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

The y term is -23y.  Take half its coefficient (-11.5).
Square it (132.25) and add it to both sides.

Add '132.25' to each side of the equation.
-23y + 132.25 + y2 = -2 + 132.25

Reorder the terms:
132.25 + -23y + y2 = -2 + 132.25

Combine like terms: -2 + 132.25 = 130.25
132.25 + -23y + y2 = 130.25

Factor a perfect square on the left side:
(y + -11.5)(y + -11.5) = 130.25

Calculate the square root of the right side: 11.412712211

Break this problem into two subproblems by setting 
(y + -11.5) equal to 11.412712211 and -11.412712211.

Subproblem 1

y + -11.5 = 11.412712211 Simplifying y + -11.5 = 11.412712211 Reorder the terms: -11.5 + y = 11.412712211 Solving -11.5 + y = 11.412712211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + y = 11.412712211 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + y = 11.412712211 + 11.5 y = 11.412712211 + 11.5 Combine like terms: 11.412712211 + 11.5 = 22.912712211 y = 22.912712211 Simplifying y = 22.912712211

Subproblem 2

y + -11.5 = -11.412712211 Simplifying y + -11.5 = -11.412712211 Reorder the terms: -11.5 + y = -11.412712211 Solving -11.5 + y = -11.412712211 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + y = -11.412712211 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + y = -11.412712211 + 11.5 y = -11.412712211 + 11.5 Combine like terms: -11.412712211 + 11.5 = 0.087287789 y = 0.087287789 Simplifying y = 0.087287789

Solution

The solution to the problem is based on the solutions from the subproblems. y = {22.912712211, 0.087287789}

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