2y^2-20y-525=0

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Solution for 2y^2-20y-525=0 equation:


Simplifying
2y2 + -20y + -525 = 0

Reorder the terms:
-525 + -20y + 2y2 = 0

Solving
-525 + -20y + 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'.
-262.5 + -10y + y2 = 0

Move the constant term to the right:

Add '262.5' to each side of the equation.
-262.5 + -10y + 262.5 + y2 = 0 + 262.5

Reorder the terms:
-262.5 + 262.5 + -10y + y2 = 0 + 262.5

Combine like terms: -262.5 + 262.5 = 0.0
0.0 + -10y + y2 = 0 + 262.5
-10y + y2 = 0 + 262.5

Combine like terms: 0 + 262.5 = 262.5
-10y + y2 = 262.5

The y term is -10y.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10y + 25 + y2 = 262.5 + 25

Reorder the terms:
25 + -10y + y2 = 262.5 + 25

Combine like terms: 262.5 + 25 = 287.5
25 + -10y + y2 = 287.5

Factor a perfect square on the left side:
(y + -5)(y + -5) = 287.5

Calculate the square root of the right side: 16.955824958

Break this problem into two subproblems by setting 
(y + -5) equal to 16.955824958 and -16.955824958.

Subproblem 1

y + -5 = 16.955824958 Simplifying y + -5 = 16.955824958 Reorder the terms: -5 + y = 16.955824958 Solving -5 + y = 16.955824958 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + y = 16.955824958 + 5 Combine like terms: -5 + 5 = 0 0 + y = 16.955824958 + 5 y = 16.955824958 + 5 Combine like terms: 16.955824958 + 5 = 21.955824958 y = 21.955824958 Simplifying y = 21.955824958

Subproblem 2

y + -5 = -16.955824958 Simplifying y + -5 = -16.955824958 Reorder the terms: -5 + y = -16.955824958 Solving -5 + y = -16.955824958 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + y = -16.955824958 + 5 Combine like terms: -5 + 5 = 0 0 + y = -16.955824958 + 5 y = -16.955824958 + 5 Combine like terms: -16.955824958 + 5 = -11.955824958 y = -11.955824958 Simplifying y = -11.955824958

Solution

The solution to the problem is based on the solutions from the subproblems. y = {21.955824958, -11.955824958}

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