8-17y+8y^2=0

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Solution for 8-17y+8y^2=0 equation:


Simplifying
8 + -17y + 8y2 = 0

Solving
8 + -17y + 8y2 = 0

Solving for variable 'y'.

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

Divide each side by '8'.
1 + -2.125y + y2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.125y + -1 + y2 = 0 + -1

Reorder the terms:
1 + -1 + -2.125y + y2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.125y + y2 = 0 + -1
-2.125y + y2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.125y + y2 = -1

The y term is -2.125y.  Take half its coefficient (-1.0625).
Square it (1.12890625) and add it to both sides.

Add '1.12890625' to each side of the equation.
-2.125y + 1.12890625 + y2 = -1 + 1.12890625

Reorder the terms:
1.12890625 + -2.125y + y2 = -1 + 1.12890625

Combine like terms: -1 + 1.12890625 = 0.12890625
1.12890625 + -2.125y + y2 = 0.12890625

Factor a perfect square on the left side:
(y + -1.0625)(y + -1.0625) = 0.12890625

Calculate the square root of the right side: 0.359035165

Break this problem into two subproblems by setting 
(y + -1.0625) equal to 0.359035165 and -0.359035165.

Subproblem 1

y + -1.0625 = 0.359035165 Simplifying y + -1.0625 = 0.359035165 Reorder the terms: -1.0625 + y = 0.359035165 Solving -1.0625 + y = 0.359035165 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.0625' to each side of the equation. -1.0625 + 1.0625 + y = 0.359035165 + 1.0625 Combine like terms: -1.0625 + 1.0625 = 0.0000 0.0000 + y = 0.359035165 + 1.0625 y = 0.359035165 + 1.0625 Combine like terms: 0.359035165 + 1.0625 = 1.421535165 y = 1.421535165 Simplifying y = 1.421535165

Subproblem 2

y + -1.0625 = -0.359035165 Simplifying y + -1.0625 = -0.359035165 Reorder the terms: -1.0625 + y = -0.359035165 Solving -1.0625 + y = -0.359035165 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.0625' to each side of the equation. -1.0625 + 1.0625 + y = -0.359035165 + 1.0625 Combine like terms: -1.0625 + 1.0625 = 0.0000 0.0000 + y = -0.359035165 + 1.0625 y = -0.359035165 + 1.0625 Combine like terms: -0.359035165 + 1.0625 = 0.703464835 y = 0.703464835 Simplifying y = 0.703464835

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.421535165, 0.703464835}

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