x^2+17x-8=0

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Solution for x^2+17x-8=0 equation:


Simplifying
x2 + 17x + -8 = 0

Reorder the terms:
-8 + 17x + x2 = 0

Solving
-8 + 17x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 17x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 17x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 17x + x2 = 0 + 8
17x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
17x + x2 = 8

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 = 8 + 72.25

Reorder the terms:
72.25 + 17x + x2 = 8 + 72.25

Combine like terms: 8 + 72.25 = 80.25
72.25 + 17x + x2 = 80.25

Factor a perfect square on the left side:
(x + 8.5)(x + 8.5) = 80.25

Calculate the square root of the right side: 8.958236434

Break this problem into two subproblems by setting 
(x + 8.5) equal to 8.958236434 and -8.958236434.


Subproblem 1
x + 8.5 = 8.958236434

Simplifying
x + 8.5 = 8.958236434

Reorder the terms:
8.5 + x = 8.958236434

Solving
8.5 + x = 8.958236434

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 = 8.958236434 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + x = 8.958236434 + -8.5
x = 8.958236434 + -8.5

Combine like terms: 8.958236434 + -8.5 = 0.458236434
x = 0.458236434

Simplifying
x = 0.458236434


Subproblem 2
x + 8.5 = -8.958236434

Simplifying
x + 8.5 = -8.958236434

Reorder the terms:
8.5 + x = -8.958236434

Solving
8.5 + x = -8.958236434

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 = -8.958236434 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + x = -8.958236434 + -8.5
x = -8.958236434 + -8.5

Combine like terms: -8.958236434 + -8.5 = -17.458236434
x = -17.458236434

Simplifying
x = -17.458236434


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.458236434, -17.458236434}

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