(-9.285714286+0.5714285714y)*(-9.285714286+0.5714285714y)+y^2=65

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Solution for (-9.285714286+0.5714285714y)*(-9.285714286+0.5714285714y)+y^2=65 equation:


Simplifying
(-9.285714286 + 0.5714285714y)(-9.285714286 + 0.5714285714y) + y2 = 65

Multiply (-9.285714286 + 0.5714285714y) * (-9.285714286 + 0.5714285714y)
(-9.285714286(-9.285714286 + 0.5714285714y) + 0.5714285714y * (-9.285714286 + 0.5714285714y)) + y2 = 65
((-9.285714286 * -9.285714286 + 0.5714285714y * -9.285714286) + 0.5714285714y * (-9.285714286 + 0.5714285714y)) + y2 = 65
((86.2244898 + -5.306122449y) + 0.5714285714y * (-9.285714286 + 0.5714285714y)) + y2 = 65
(86.2244898 + -5.306122449y + (-9.285714286 * 0.5714285714y + 0.5714285714y * 0.5714285714y)) + y2 = 65
(86.2244898 + -5.306122449y + (-5.306122449y + 0.3265306122y2)) + y2 = 65

Combine like terms: -5.306122449y + -5.306122449y = -10.612244898y
(86.2244898 + -10.612244898y + 0.3265306122y2) + y2 = 65

Combine like terms: 0.3265306122y2 + y2 = 1.3265306122y2
86.2244898 + -10.612244898y + 1.3265306122y2 = 65

Solving
86.2244898 + -10.612244898y + 1.3265306122y2 = 65

Solving for variable 'y'.

Reorder the terms:
86.2244898 + -65 + -10.612244898y + 1.3265306122y2 = 65 + -65

Combine like terms: 86.2244898 + -65 = 21.2244898
21.2244898 + -10.612244898y + 1.3265306122y2 = 65 + -65

Combine like terms: 65 + -65 = 0
21.2244898 + -10.612244898y + 1.3265306122y2 = 0

Begin completing the square.  Divide all terms by
1.3265306122 the coefficient of the squared term: 

Divide each side by '1.3265306122'.
16 + -8y + y2 = 0

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + -8y + -16 + y2 = 0 + -16

Reorder the terms:
16 + -16 + -8y + y2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -8y + y2 = 0 + -16
-8y + y2 = 0 + -16

Combine like terms: 0 + -16 = -16
-8y + y2 = -16

The y term is -8y.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8y + 16 + y2 = -16 + 16

Reorder the terms:
16 + -8y + y2 = -16 + 16

Combine like terms: -16 + 16 = 0
16 + -8y + y2 = 0

Factor a perfect square on the left side:
(y + -4)(y + -4) = 0

Calculate the square root of the right side: 0

Break this problem into two subproblems by setting 
(y + -4) equal to 0 and 0.

Subproblem 1

y + -4 = 0 Simplifying y + -4 = 0 Reorder the terms: -4 + y = 0 Solving -4 + y = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = 0 + 4 Combine like terms: -4 + 4 = 0 0 + y = 0 + 4 y = 0 + 4 Combine like terms: 0 + 4 = 4 y = 4 Simplifying y = 4

Subproblem 2

y + -4 = 0 Simplifying y + -4 = 0 Reorder the terms: -4 + y = 0 Solving -4 + y = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = 0 + 4 Combine like terms: -4 + 4 = 0 0 + y = 0 + 4 y = 0 + 4 Combine like terms: 0 + 4 = 4 y = 4 Simplifying y = 4

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4, 4}

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