x^2+9x-17=0

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Solution for x^2+9x-17=0 equation:


Simplifying
x2 + 9x + -17 = 0

Reorder the terms:
-17 + 9x + x2 = 0

Solving
-17 + 9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + 9x + 17 + x2 = 0 + 17

Reorder the terms:
-17 + 17 + 9x + x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 9x + x2 = 0 + 17
9x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
9x + x2 = 17

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 17 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 17 + 20.25

Combine like terms: 17 + 20.25 = 37.25
20.25 + 9x + x2 = 37.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 37.25

Calculate the square root of the right side: 6.103277808

Break this problem into two subproblems by setting 
(x + 4.5) equal to 6.103277808 and -6.103277808.

Subproblem 1

x + 4.5 = 6.103277808 Simplifying x + 4.5 = 6.103277808 Reorder the terms: 4.5 + x = 6.103277808 Solving 4.5 + x = 6.103277808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 6.103277808 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 6.103277808 + -4.5 x = 6.103277808 + -4.5 Combine like terms: 6.103277808 + -4.5 = 1.603277808 x = 1.603277808 Simplifying x = 1.603277808

Subproblem 2

x + 4.5 = -6.103277808 Simplifying x + 4.5 = -6.103277808 Reorder the terms: 4.5 + x = -6.103277808 Solving 4.5 + x = -6.103277808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -6.103277808 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -6.103277808 + -4.5 x = -6.103277808 + -4.5 Combine like terms: -6.103277808 + -4.5 = -10.603277808 x = -10.603277808 Simplifying x = -10.603277808

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.603277808, -10.603277808}

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