y^2+5y+6.25=0

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Solution for y^2+5y+6.25=0 equation:


Simplifying
y2 + 5y + 6.25 = 0

Reorder the terms:
6.25 + 5y + y2 = 0

Solving
6.25 + 5y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + 5y + -6.25 + y2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + 5y + y2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + 5y + y2 = 0 + -6.25
5y + y2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
5y + y2 = -6.25

The y term is 5y.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5y + 6.25 + y2 = -6.25 + 6.25

Reorder the terms:
6.25 + 5y + y2 = -6.25 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
6.25 + 5y + y2 = 0.00

Factor a perfect square on the left side:
(y + 2.5)(y + 2.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(y + 2.5) equal to 0.00 and 0.00.

Subproblem 1

y + 2.5 = 0.00 Simplifying y + 2.5 = 0.00 Reorder the terms: 2.5 + y = 0.00 Solving 2.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = 0.00 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = 0.00 + -2.5 y = 0.00 + -2.5 Combine like terms: 0.00 + -2.5 = -2.5 y = -2.5 Simplifying y = -2.5

Subproblem 2

y + 2.5 = 0.00 Simplifying y + 2.5 = 0.00 Reorder the terms: 2.5 + y = 0.00 Solving 2.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = 0.00 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = 0.00 + -2.5 y = 0.00 + -2.5 Combine like terms: 0.00 + -2.5 = -2.5 y = -2.5 Simplifying y = -2.5

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-2.5, -2.5}

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