2y^2-25y+13=0

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Solution for 2y^2-25y+13=0 equation:


Simplifying
2y2 + -25y + 13 = 0

Reorder the terms:
13 + -25y + 2y2 = 0

Solving
13 + -25y + 2y2 = 0

Solving for variable 'y'.

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

Divide each side by '2'.
6.5 + -12.5y + y2 = 0

Move the constant term to the right:

Add '-6.5' to each side of the equation.
6.5 + -12.5y + -6.5 + y2 = 0 + -6.5

Reorder the terms:
6.5 + -6.5 + -12.5y + y2 = 0 + -6.5

Combine like terms: 6.5 + -6.5 = 0.0
0.0 + -12.5y + y2 = 0 + -6.5
-12.5y + y2 = 0 + -6.5

Combine like terms: 0 + -6.5 = -6.5
-12.5y + y2 = -6.5

The y term is -12.5y.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5y + 39.0625 + y2 = -6.5 + 39.0625

Reorder the terms:
39.0625 + -12.5y + y2 = -6.5 + 39.0625

Combine like terms: -6.5 + 39.0625 = 32.5625
39.0625 + -12.5y + y2 = 32.5625

Factor a perfect square on the left side:
(y + -6.25)(y + -6.25) = 32.5625

Calculate the square root of the right side: 5.706356105

Break this problem into two subproblems by setting 
(y + -6.25) equal to 5.706356105 and -5.706356105.

Subproblem 1

y + -6.25 = 5.706356105 Simplifying y + -6.25 = 5.706356105 Reorder the terms: -6.25 + y = 5.706356105 Solving -6.25 + y = 5.706356105 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + y = 5.706356105 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + y = 5.706356105 + 6.25 y = 5.706356105 + 6.25 Combine like terms: 5.706356105 + 6.25 = 11.956356105 y = 11.956356105 Simplifying y = 11.956356105

Subproblem 2

y + -6.25 = -5.706356105 Simplifying y + -6.25 = -5.706356105 Reorder the terms: -6.25 + y = -5.706356105 Solving -6.25 + y = -5.706356105 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + y = -5.706356105 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + y = -5.706356105 + 6.25 y = -5.706356105 + 6.25 Combine like terms: -5.706356105 + 6.25 = 0.543643895 y = 0.543643895 Simplifying y = 0.543643895

Solution

The solution to the problem is based on the solutions from the subproblems. y = {11.956356105, 0.543643895}

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