y^2-20y+50=0

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Solution for y^2-20y+50=0 equation:


Simplifying
y2 + -20y + 50 = 0

Reorder the terms:
50 + -20y + y2 = 0

Solving
50 + -20y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + -20y + -50 + y2 = 0 + -50

Reorder the terms:
50 + -50 + -20y + y2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -20y + y2 = 0 + -50
-20y + y2 = 0 + -50

Combine like terms: 0 + -50 = -50
-20y + y2 = -50

The y term is -20y.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20y + 100 + y2 = -50 + 100

Reorder the terms:
100 + -20y + y2 = -50 + 100

Combine like terms: -50 + 100 = 50
100 + -20y + y2 = 50

Factor a perfect square on the left side:
(y + -10)(y + -10) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(y + -10) equal to 7.071067812 and -7.071067812.

Subproblem 1

y + -10 = 7.071067812 Simplifying y + -10 = 7.071067812 Reorder the terms: -10 + y = 7.071067812 Solving -10 + y = 7.071067812 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + y = 7.071067812 + 10 Combine like terms: -10 + 10 = 0 0 + y = 7.071067812 + 10 y = 7.071067812 + 10 Combine like terms: 7.071067812 + 10 = 17.071067812 y = 17.071067812 Simplifying y = 17.071067812

Subproblem 2

y + -10 = -7.071067812 Simplifying y + -10 = -7.071067812 Reorder the terms: -10 + y = -7.071067812 Solving -10 + y = -7.071067812 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + y = -7.071067812 + 10 Combine like terms: -10 + 10 = 0 0 + y = -7.071067812 + 10 y = -7.071067812 + 10 Combine like terms: -7.071067812 + 10 = 2.928932188 y = 2.928932188 Simplifying y = 2.928932188

Solution

The solution to the problem is based on the solutions from the subproblems. y = {17.071067812, 2.928932188}

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