0=y^2-11y+14

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Solution for 0=y^2-11y+14 equation:


Simplifying
0 = y2 + -11y + 14

Reorder the terms:
0 = 14 + -11y + y2

Solving
0 = 14 + -11y + y2

Solving for variable 'y'.

Combine like terms: 0 + -14 = -14
-14 + 11y + -1y2 = 14 + -11y + y2 + -14 + 11y + -1y2

Reorder the terms:
-14 + 11y + -1y2 = 14 + -14 + -11y + 11y + y2 + -1y2

Combine like terms: 14 + -14 = 0
-14 + 11y + -1y2 = 0 + -11y + 11y + y2 + -1y2
-14 + 11y + -1y2 = -11y + 11y + y2 + -1y2

Combine like terms: -11y + 11y = 0
-14 + 11y + -1y2 = 0 + y2 + -1y2
-14 + 11y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-14 + 11y + -1y2 = 0

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

Divide each side by '-1'.
14 + -11y + y2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -11y + -14 + y2 = 0 + -14

Reorder the terms:
14 + -14 + -11y + y2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -11y + y2 = 0 + -14
-11y + y2 = 0 + -14

Combine like terms: 0 + -14 = -14
-11y + y2 = -14

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 = -14 + 30.25

Reorder the terms:
30.25 + -11y + y2 = -14 + 30.25

Combine like terms: -14 + 30.25 = 16.25
30.25 + -11y + y2 = 16.25

Factor a perfect square on the left side:
(y + -5.5)(y + -5.5) = 16.25

Calculate the square root of the right side: 4.031128874

Break this problem into two subproblems by setting 
(y + -5.5) equal to 4.031128874 and -4.031128874.

Subproblem 1

y + -5.5 = 4.031128874 Simplifying y + -5.5 = 4.031128874 Reorder the terms: -5.5 + y = 4.031128874 Solving -5.5 + y = 4.031128874 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 = 4.031128874 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = 4.031128874 + 5.5 y = 4.031128874 + 5.5 Combine like terms: 4.031128874 + 5.5 = 9.531128874 y = 9.531128874 Simplifying y = 9.531128874

Subproblem 2

y + -5.5 = -4.031128874 Simplifying y + -5.5 = -4.031128874 Reorder the terms: -5.5 + y = -4.031128874 Solving -5.5 + y = -4.031128874 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 = -4.031128874 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + y = -4.031128874 + 5.5 y = -4.031128874 + 5.5 Combine like terms: -4.031128874 + 5.5 = 1.468871126 y = 1.468871126 Simplifying y = 1.468871126

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.531128874, 1.468871126}

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