2y+y^2=25

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Solution for 2y+y^2=25 equation:


Simplifying
2y + y2 = 25

Solving
2y + y2 = 25

Solving for variable 'y'.

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

Combine like terms: 25 + -25 = 0
-25 + 2y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 2y + 25 + y2 = 0 + 25

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

Combine like terms: -25 + 25 = 0
0 + 2y + y2 = 0 + 25
2y + y2 = 0 + 25

Combine like terms: 0 + 25 = 25
2y + y2 = 25

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 = 25 + 1

Reorder the terms:
1 + 2y + y2 = 25 + 1

Combine like terms: 25 + 1 = 26
1 + 2y + y2 = 26

Factor a perfect square on the left side:
(y + 1)(y + 1) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(y + 1) equal to 5.099019514 and -5.099019514.

Subproblem 1

y + 1 = 5.099019514 Simplifying y + 1 = 5.099019514 Reorder the terms: 1 + y = 5.099019514 Solving 1 + y = 5.099019514 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 = 5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + y = 5.099019514 + -1 y = 5.099019514 + -1 Combine like terms: 5.099019514 + -1 = 4.099019514 y = 4.099019514 Simplifying y = 4.099019514

Subproblem 2

y + 1 = -5.099019514 Simplifying y + 1 = -5.099019514 Reorder the terms: 1 + y = -5.099019514 Solving 1 + y = -5.099019514 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 = -5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + y = -5.099019514 + -1 y = -5.099019514 + -1 Combine like terms: -5.099019514 + -1 = -6.099019514 y = -6.099019514 Simplifying y = -6.099019514

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.099019514, -6.099019514}

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