y^2+36=2y^2-18y+41

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Solution for y^2+36=2y^2-18y+41 equation:


Simplifying
y2 + 36 = 2y2 + -18y + 41

Reorder the terms:
36 + y2 = 2y2 + -18y + 41

Reorder the terms:
36 + y2 = 41 + -18y + 2y2

Solving
36 + y2 = 41 + -18y + 2y2

Solving for variable 'y'.

Reorder the terms:
36 + -41 + 18y + y2 + -2y2 = 41 + -18y + 2y2 + -41 + 18y + -2y2

Combine like terms: 36 + -41 = -5
-5 + 18y + y2 + -2y2 = 41 + -18y + 2y2 + -41 + 18y + -2y2

Combine like terms: y2 + -2y2 = -1y2
-5 + 18y + -1y2 = 41 + -18y + 2y2 + -41 + 18y + -2y2

Reorder the terms:
-5 + 18y + -1y2 = 41 + -41 + -18y + 18y + 2y2 + -2y2

Combine like terms: 41 + -41 = 0
-5 + 18y + -1y2 = 0 + -18y + 18y + 2y2 + -2y2
-5 + 18y + -1y2 = -18y + 18y + 2y2 + -2y2

Combine like terms: -18y + 18y = 0
-5 + 18y + -1y2 = 0 + 2y2 + -2y2
-5 + 18y + -1y2 = 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
-5 + 18y + -1y2 = 0

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

Divide each side by '-1'.
5 + -18y + y2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -18y + -5 + y2 = 0 + -5

Reorder the terms:
5 + -5 + -18y + y2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -18y + y2 = 0 + -5
-18y + y2 = 0 + -5

Combine like terms: 0 + -5 = -5
-18y + y2 = -5

The y term is -18y.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18y + 81 + y2 = -5 + 81

Reorder the terms:
81 + -18y + y2 = -5 + 81

Combine like terms: -5 + 81 = 76
81 + -18y + y2 = 76

Factor a perfect square on the left side:
(y + -9)(y + -9) = 76

Calculate the square root of the right side: 8.717797887

Break this problem into two subproblems by setting 
(y + -9) equal to 8.717797887 and -8.717797887.

Subproblem 1

y + -9 = 8.717797887 Simplifying y + -9 = 8.717797887 Reorder the terms: -9 + y = 8.717797887 Solving -9 + y = 8.717797887 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + y = 8.717797887 + 9 Combine like terms: -9 + 9 = 0 0 + y = 8.717797887 + 9 y = 8.717797887 + 9 Combine like terms: 8.717797887 + 9 = 17.717797887 y = 17.717797887 Simplifying y = 17.717797887

Subproblem 2

y + -9 = -8.717797887 Simplifying y + -9 = -8.717797887 Reorder the terms: -9 + y = -8.717797887 Solving -9 + y = -8.717797887 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + y = -8.717797887 + 9 Combine like terms: -9 + 9 = 0 0 + y = -8.717797887 + 9 y = -8.717797887 + 9 Combine like terms: -8.717797887 + 9 = 0.282202113 y = 0.282202113 Simplifying y = 0.282202113

Solution

The solution to the problem is based on the solutions from the subproblems. y = {17.717797887, 0.282202113}

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