x^2+17x=-5

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Solution for x^2+17x=-5 equation:


Simplifying
x2 + 17x = -5

Reorder the terms:
17x + x2 = -5

Solving
17x + x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + 17x + x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + 17x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 17x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + 17x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 17x + x2 = 0 + -5
17x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
17x + x2 = -5

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 = -5 + 72.25

Reorder the terms:
72.25 + 17x + x2 = -5 + 72.25

Combine like terms: -5 + 72.25 = 67.25
72.25 + 17x + x2 = 67.25

Factor a perfect square on the left side:
(x + 8.5)(x + 8.5) = 67.25

Calculate the square root of the right side: 8.200609733

Break this problem into two subproblems by setting 
(x + 8.5) equal to 8.200609733 and -8.200609733.

Subproblem 1

x + 8.5 = 8.200609733 Simplifying x + 8.5 = 8.200609733 Reorder the terms: 8.5 + x = 8.200609733 Solving 8.5 + x = 8.200609733 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 = 8.200609733 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + x = 8.200609733 + -8.5 x = 8.200609733 + -8.5 Combine like terms: 8.200609733 + -8.5 = -0.299390267 x = -0.299390267 Simplifying x = -0.299390267

Subproblem 2

x + 8.5 = -8.200609733 Simplifying x + 8.5 = -8.200609733 Reorder the terms: 8.5 + x = -8.200609733 Solving 8.5 + x = -8.200609733 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 = -8.200609733 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + x = -8.200609733 + -8.5 x = -8.200609733 + -8.5 Combine like terms: -8.200609733 + -8.5 = -16.700609733 x = -16.700609733 Simplifying x = -16.700609733

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.299390267, -16.700609733}

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