y^2+72.25=-17y

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Solution for y^2+72.25=-17y equation:


Simplifying
y2 + 72.25 = -17y

Reorder the terms:
72.25 + y2 = -17y

Solving
72.25 + y2 = -17y

Solving for variable 'y'.

Reorder the terms:
72.25 + 17y + y2 = -17y + 17y

Combine like terms: -17y + 17y = 0
72.25 + 17y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-72.25' to each side of the equation.
72.25 + 17y + -72.25 + y2 = 0 + -72.25

Reorder the terms:
72.25 + -72.25 + 17y + y2 = 0 + -72.25

Combine like terms: 72.25 + -72.25 = 0.00
0.00 + 17y + y2 = 0 + -72.25
17y + y2 = 0 + -72.25

Combine like terms: 0 + -72.25 = -72.25
17y + y2 = -72.25

The y term is 17y.  Take half its coefficient (8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
17y + 72.25 + y2 = -72.25 + 72.25

Reorder the terms:
72.25 + 17y + y2 = -72.25 + 72.25

Combine like terms: -72.25 + 72.25 = 0.00
72.25 + 17y + y2 = 0.00

Factor a perfect square on the left side:
(y + 8.5)(y + 8.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(y + 8.5) equal to 0.00 and 0.00.

Subproblem 1

y + 8.5 = 0.00 Simplifying y + 8.5 = 0.00 Reorder the terms: 8.5 + y = 0.00 Solving 8.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + y = 0.00 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = 0.00 + -8.5 y = 0.00 + -8.5 Combine like terms: 0.00 + -8.5 = -8.5 y = -8.5 Simplifying y = -8.5

Subproblem 2

y + 8.5 = 0.00 Simplifying y + 8.5 = 0.00 Reorder the terms: 8.5 + y = 0.00 Solving 8.5 + y = 0.00 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + y = 0.00 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = 0.00 + -8.5 y = 0.00 + -8.5 Combine like terms: 0.00 + -8.5 = -8.5 y = -8.5 Simplifying y = -8.5

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-8.5, -8.5}

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