y^2+57y+57=0

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Solution for y^2+57y+57=0 equation:


Simplifying
y2 + 57y + 57 = 0

Reorder the terms:
57 + 57y + y2 = 0

Solving
57 + 57y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-57' to each side of the equation.
57 + 57y + -57 + y2 = 0 + -57

Reorder the terms:
57 + -57 + 57y + y2 = 0 + -57

Combine like terms: 57 + -57 = 0
0 + 57y + y2 = 0 + -57
57y + y2 = 0 + -57

Combine like terms: 0 + -57 = -57
57y + y2 = -57

The y term is 57y.  Take half its coefficient (28.5).
Square it (812.25) and add it to both sides.

Add '812.25' to each side of the equation.
57y + 812.25 + y2 = -57 + 812.25

Reorder the terms:
812.25 + 57y + y2 = -57 + 812.25

Combine like terms: -57 + 812.25 = 755.25
812.25 + 57y + y2 = 755.25

Factor a perfect square on the left side:
(y + 28.5)(y + 28.5) = 755.25

Calculate the square root of the right side: 27.481812167

Break this problem into two subproblems by setting 
(y + 28.5) equal to 27.481812167 and -27.481812167.

Subproblem 1

y + 28.5 = 27.481812167 Simplifying y + 28.5 = 27.481812167 Reorder the terms: 28.5 + y = 27.481812167 Solving 28.5 + y = 27.481812167 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-28.5' to each side of the equation. 28.5 + -28.5 + y = 27.481812167 + -28.5 Combine like terms: 28.5 + -28.5 = 0.0 0.0 + y = 27.481812167 + -28.5 y = 27.481812167 + -28.5 Combine like terms: 27.481812167 + -28.5 = -1.018187833 y = -1.018187833 Simplifying y = -1.018187833

Subproblem 2

y + 28.5 = -27.481812167 Simplifying y + 28.5 = -27.481812167 Reorder the terms: 28.5 + y = -27.481812167 Solving 28.5 + y = -27.481812167 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-28.5' to each side of the equation. 28.5 + -28.5 + y = -27.481812167 + -28.5 Combine like terms: 28.5 + -28.5 = 0.0 0.0 + y = -27.481812167 + -28.5 y = -27.481812167 + -28.5 Combine like terms: -27.481812167 + -28.5 = -55.981812167 y = -55.981812167 Simplifying y = -55.981812167

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-1.018187833, -55.981812167}

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