y^2+17y+6=0

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Solution for y^2+17y+6=0 equation:


Simplifying
y2 + 17y + 6 = 0

Reorder the terms:
6 + 17y + y2 = 0

Solving
6 + 17y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 17y + -6 + y2 = 0 + -6

Reorder the terms:
6 + -6 + 17y + y2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 17y + y2 = 0 + -6
17y + y2 = 0 + -6

Combine like terms: 0 + -6 = -6
17y + y2 = -6

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 = -6 + 72.25

Reorder the terms:
72.25 + 17y + y2 = -6 + 72.25

Combine like terms: -6 + 72.25 = 66.25
72.25 + 17y + y2 = 66.25

Factor a perfect square on the left side:
(y + 8.5)(y + 8.5) = 66.25

Calculate the square root of the right side: 8.139410298

Break this problem into two subproblems by setting 
(y + 8.5) equal to 8.139410298 and -8.139410298.

Subproblem 1

y + 8.5 = 8.139410298 Simplifying y + 8.5 = 8.139410298 Reorder the terms: 8.5 + y = 8.139410298 Solving 8.5 + y = 8.139410298 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 = 8.139410298 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = 8.139410298 + -8.5 y = 8.139410298 + -8.5 Combine like terms: 8.139410298 + -8.5 = -0.360589702 y = -0.360589702 Simplifying y = -0.360589702

Subproblem 2

y + 8.5 = -8.139410298 Simplifying y + 8.5 = -8.139410298 Reorder the terms: 8.5 + y = -8.139410298 Solving 8.5 + y = -8.139410298 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 = -8.139410298 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + y = -8.139410298 + -8.5 y = -8.139410298 + -8.5 Combine like terms: -8.139410298 + -8.5 = -16.639410298 y = -16.639410298 Simplifying y = -16.639410298

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-0.360589702, -16.639410298}

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