y^2-40y+60=0

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Solution for y^2-40y+60=0 equation:


Simplifying
y2 + -40y + 60 = 0

Reorder the terms:
60 + -40y + y2 = 0

Solving
60 + -40y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-60' to each side of the equation.
60 + -40y + -60 + y2 = 0 + -60

Reorder the terms:
60 + -60 + -40y + y2 = 0 + -60

Combine like terms: 60 + -60 = 0
0 + -40y + y2 = 0 + -60
-40y + y2 = 0 + -60

Combine like terms: 0 + -60 = -60
-40y + y2 = -60

The y term is -40y.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40y + 400 + y2 = -60 + 400

Reorder the terms:
400 + -40y + y2 = -60 + 400

Combine like terms: -60 + 400 = 340
400 + -40y + y2 = 340

Factor a perfect square on the left side:
(y + -20)(y + -20) = 340

Calculate the square root of the right side: 18.439088915

Break this problem into two subproblems by setting 
(y + -20) equal to 18.439088915 and -18.439088915.

Subproblem 1

y + -20 = 18.439088915 Simplifying y + -20 = 18.439088915 Reorder the terms: -20 + y = 18.439088915 Solving -20 + y = 18.439088915 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + y = 18.439088915 + 20 Combine like terms: -20 + 20 = 0 0 + y = 18.439088915 + 20 y = 18.439088915 + 20 Combine like terms: 18.439088915 + 20 = 38.439088915 y = 38.439088915 Simplifying y = 38.439088915

Subproblem 2

y + -20 = -18.439088915 Simplifying y + -20 = -18.439088915 Reorder the terms: -20 + y = -18.439088915 Solving -20 + y = -18.439088915 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + y = -18.439088915 + 20 Combine like terms: -20 + 20 = 0 0 + y = -18.439088915 + 20 y = -18.439088915 + 20 Combine like terms: -18.439088915 + 20 = 1.560911085 y = 1.560911085 Simplifying y = 1.560911085

Solution

The solution to the problem is based on the solutions from the subproblems. y = {38.439088915, 1.560911085}

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