x^2+17x=-2

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Solution for x^2+17x=-2 equation:


Simplifying
x2 + 17x = -2

Reorder the terms:
17x + x2 = -2

Solving
17x + x2 = -2

Solving for variable 'x'.

Reorder the terms:
2 + 17x + x2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + 17x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 17x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + 17x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 17x + x2 = 0 + -2
17x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
17x + x2 = -2

The x term is 17x.  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.
17x + 72.25 + x2 = -2 + 72.25

Reorder the terms:
72.25 + 17x + x2 = -2 + 72.25

Combine like terms: -2 + 72.25 = 70.25
72.25 + 17x + x2 = 70.25

Factor a perfect square on the left side:
(x + 8.5)(x + 8.5) = 70.25

Calculate the square root of the right side: 8.381527307

Break this problem into two subproblems by setting 
(x + 8.5) equal to 8.381527307 and -8.381527307.

Subproblem 1

x + 8.5 = 8.381527307 Simplifying x + 8.5 = 8.381527307 Reorder the terms: 8.5 + x = 8.381527307 Solving 8.5 + x = 8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + x = 8.381527307 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + x = 8.381527307 + -8.5 x = 8.381527307 + -8.5 Combine like terms: 8.381527307 + -8.5 = -0.118472693 x = -0.118472693 Simplifying x = -0.118472693

Subproblem 2

x + 8.5 = -8.381527307 Simplifying x + 8.5 = -8.381527307 Reorder the terms: 8.5 + x = -8.381527307 Solving 8.5 + x = -8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + x = -8.381527307 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + x = -8.381527307 + -8.5 x = -8.381527307 + -8.5 Combine like terms: -8.381527307 + -8.5 = -16.881527307 x = -16.881527307 Simplifying x = -16.881527307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.118472693, -16.881527307}

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