119+9y-y^2=

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Solution for 119+9y-y^2= equation:


Simplifying
119 + 9y + -1y2 = 0

Solving
119 + 9y + -1y2 = 0

Solving for variable 'y'.

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

Divide each side by '-1'.
-119 + -9y + y2 = 0

Move the constant term to the right:

Add '119' to each side of the equation.
-119 + -9y + 119 + y2 = 0 + 119

Reorder the terms:
-119 + 119 + -9y + y2 = 0 + 119

Combine like terms: -119 + 119 = 0
0 + -9y + y2 = 0 + 119
-9y + y2 = 0 + 119

Combine like terms: 0 + 119 = 119
-9y + y2 = 119

The y term is -9y.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9y + 20.25 + y2 = 119 + 20.25

Reorder the terms:
20.25 + -9y + y2 = 119 + 20.25

Combine like terms: 119 + 20.25 = 139.25
20.25 + -9y + y2 = 139.25

Factor a perfect square on the left side:
(y + -4.5)(y + -4.5) = 139.25

Calculate the square root of the right side: 11.800423721

Break this problem into two subproblems by setting 
(y + -4.5) equal to 11.800423721 and -11.800423721.

Subproblem 1

y + -4.5 = 11.800423721 Simplifying y + -4.5 = 11.800423721 Reorder the terms: -4.5 + y = 11.800423721 Solving -4.5 + y = 11.800423721 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = 11.800423721 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = 11.800423721 + 4.5 y = 11.800423721 + 4.5 Combine like terms: 11.800423721 + 4.5 = 16.300423721 y = 16.300423721 Simplifying y = 16.300423721

Subproblem 2

y + -4.5 = -11.800423721 Simplifying y + -4.5 = -11.800423721 Reorder the terms: -4.5 + y = -11.800423721 Solving -4.5 + y = -11.800423721 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = -11.800423721 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = -11.800423721 + 4.5 y = -11.800423721 + 4.5 Combine like terms: -11.800423721 + 4.5 = -7.300423721 y = -7.300423721 Simplifying y = -7.300423721

Solution

The solution to the problem is based on the solutions from the subproblems. y = {16.300423721, -7.300423721}

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