25y^2+104y+25=0

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Solution for 25y^2+104y+25=0 equation:


Simplifying
25y2 + 104y + 25 = 0

Reorder the terms:
25 + 104y + 25y2 = 0

Solving
25 + 104y + 25y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
25 the coefficient of the squared term: 

Divide each side by '25'.
1 + 4.16y + y2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 4.16y + -1 + y2 = 0 + -1

Reorder the terms:
1 + -1 + 4.16y + y2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4.16y + y2 = 0 + -1
4.16y + y2 = 0 + -1

Combine like terms: 0 + -1 = -1
4.16y + y2 = -1

The y term is 4.16y.  Take half its coefficient (2.08).
Square it (4.3264) and add it to both sides.

Add '4.3264' to each side of the equation.
4.16y + 4.3264 + y2 = -1 + 4.3264

Reorder the terms:
4.3264 + 4.16y + y2 = -1 + 4.3264

Combine like terms: -1 + 4.3264 = 3.3264
4.3264 + 4.16y + y2 = 3.3264

Factor a perfect square on the left side:
(y + 2.08)(y + 2.08) = 3.3264

Calculate the square root of the right side: 1.823842098

Break this problem into two subproblems by setting 
(y + 2.08) equal to 1.823842098 and -1.823842098.

Subproblem 1

y + 2.08 = 1.823842098 Simplifying y + 2.08 = 1.823842098 Reorder the terms: 2.08 + y = 1.823842098 Solving 2.08 + y = 1.823842098 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.08' to each side of the equation. 2.08 + -2.08 + y = 1.823842098 + -2.08 Combine like terms: 2.08 + -2.08 = 0.00 0.00 + y = 1.823842098 + -2.08 y = 1.823842098 + -2.08 Combine like terms: 1.823842098 + -2.08 = -0.256157902 y = -0.256157902 Simplifying y = -0.256157902

Subproblem 2

y + 2.08 = -1.823842098 Simplifying y + 2.08 = -1.823842098 Reorder the terms: 2.08 + y = -1.823842098 Solving 2.08 + y = -1.823842098 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.08' to each side of the equation. 2.08 + -2.08 + y = -1.823842098 + -2.08 Combine like terms: 2.08 + -2.08 = 0.00 0.00 + y = -1.823842098 + -2.08 y = -1.823842098 + -2.08 Combine like terms: -1.823842098 + -2.08 = -3.903842098 y = -3.903842098 Simplifying y = -3.903842098

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.256157902, -3.903842098}

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