11y=y^2+20

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Solution for 11y=y^2+20 equation:


Simplifying
11y = y2 + 20

Reorder the terms:
11y = 20 + y2

Solving
11y = 20 + y2

Solving for variable 'y'.

Reorder the terms:
-20 + 11y + -1y2 = 20 + y2 + -20 + -1y2

Reorder the terms:
-20 + 11y + -1y2 = 20 + -20 + y2 + -1y2

Combine like terms: 20 + -20 = 0
-20 + 11y + -1y2 = 0 + y2 + -1y2
-20 + 11y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-20 + 11y + -1y2 = 0

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

Divide each side by '-1'.
20 + -11y + y2 = 0

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -11y + -20 + y2 = 0 + -20

Reorder the terms:
20 + -20 + -11y + y2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -11y + y2 = 0 + -20
-11y + y2 = 0 + -20

Combine like terms: 0 + -20 = -20
-11y + y2 = -20

The y term is -11y.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11y + 30.25 + y2 = -20 + 30.25

Reorder the terms:
30.25 + -11y + y2 = -20 + 30.25

Combine like terms: -20 + 30.25 = 10.25
30.25 + -11y + y2 = 10.25

Factor a perfect square on the left side:
(y + -5.5)(y + -5.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(y + -5.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

y + -5.5 = 3.201562119 Simplifying y + -5.5 = 3.201562119 Reorder the terms: -5.5 + y = 3.201562119 Solving -5.5 + y = 3.201562119 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + y = 3.201562119 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = 3.201562119 + 5.5 y = 3.201562119 + 5.5 Combine like terms: 3.201562119 + 5.5 = 8.701562119 y = 8.701562119 Simplifying y = 8.701562119

Subproblem 2

y + -5.5 = -3.201562119 Simplifying y + -5.5 = -3.201562119 Reorder the terms: -5.5 + y = -3.201562119 Solving -5.5 + y = -3.201562119 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + y = -3.201562119 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = -3.201562119 + 5.5 y = -3.201562119 + 5.5 Combine like terms: -3.201562119 + 5.5 = 2.298437881 y = 2.298437881 Simplifying y = 2.298437881

Solution

The solution to the problem is based on the solutions from the subproblems. y = {8.701562119, 2.298437881}

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