y^2+2y-252=0

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Solution for y^2+2y-252=0 equation:


Simplifying
y2 + 2y + -252 = 0

Reorder the terms:
-252 + 2y + y2 = 0

Solving
-252 + 2y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '252' to each side of the equation.
-252 + 2y + 252 + y2 = 0 + 252

Reorder the terms:
-252 + 252 + 2y + y2 = 0 + 252

Combine like terms: -252 + 252 = 0
0 + 2y + y2 = 0 + 252
2y + y2 = 0 + 252

Combine like terms: 0 + 252 = 252
2y + y2 = 252

The y term is 2y.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2y + 1 + y2 = 252 + 1

Reorder the terms:
1 + 2y + y2 = 252 + 1

Combine like terms: 252 + 1 = 253
1 + 2y + y2 = 253

Factor a perfect square on the left side:
(y + 1)(y + 1) = 253

Calculate the square root of the right side: 15.905973721

Break this problem into two subproblems by setting 
(y + 1) equal to 15.905973721 and -15.905973721.

Subproblem 1

y + 1 = 15.905973721 Simplifying y + 1 = 15.905973721 Reorder the terms: 1 + y = 15.905973721 Solving 1 + y = 15.905973721 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + y = 15.905973721 + -1 Combine like terms: 1 + -1 = 0 0 + y = 15.905973721 + -1 y = 15.905973721 + -1 Combine like terms: 15.905973721 + -1 = 14.905973721 y = 14.905973721 Simplifying y = 14.905973721

Subproblem 2

y + 1 = -15.905973721 Simplifying y + 1 = -15.905973721 Reorder the terms: 1 + y = -15.905973721 Solving 1 + y = -15.905973721 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + y = -15.905973721 + -1 Combine like terms: 1 + -1 = 0 0 + y = -15.905973721 + -1 y = -15.905973721 + -1 Combine like terms: -15.905973721 + -1 = -16.905973721 y = -16.905973721 Simplifying y = -16.905973721

Solution

The solution to the problem is based on the solutions from the subproblems. y = {14.905973721, -16.905973721}

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