9x^2+4x-17=0

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Solution for 9x^2+4x-17=0 equation:


Simplifying
9x2 + 4x + -17 = 0

Reorder the terms:
-17 + 4x + 9x2 = 0

Solving
-17 + 4x + 9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-1.888888889 + 0.4444444444x + x2 = 0

Move the constant term to the right:

Add '1.888888889' to each side of the equation.
-1.888888889 + 0.4444444444x + 1.888888889 + x2 = 0 + 1.888888889

Reorder the terms:
-1.888888889 + 1.888888889 + 0.4444444444x + x2 = 0 + 1.888888889

Combine like terms: -1.888888889 + 1.888888889 = 0.000000000
0.000000000 + 0.4444444444x + x2 = 0 + 1.888888889
0.4444444444x + x2 = 0 + 1.888888889

Combine like terms: 0 + 1.888888889 = 1.888888889
0.4444444444x + x2 = 1.888888889

The x term is 0.4444444444x.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444x + 0.04938271604 + x2 = 1.888888889 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444x + x2 = 1.888888889 + 0.04938271604

Combine like terms: 1.888888889 + 0.04938271604 = 1.93827160504
0.04938271604 + 0.4444444444x + x2 = 1.93827160504

Factor a perfect square on the left side:
(x + 0.2222222222)(x + 0.2222222222) = 1.93827160504

Calculate the square root of the right side: 1.392218232

Break this problem into two subproblems by setting 
(x + 0.2222222222) equal to 1.392218232 and -1.392218232.

Subproblem 1

x + 0.2222222222 = 1.392218232 Simplifying x + 0.2222222222 = 1.392218232 Reorder the terms: 0.2222222222 + x = 1.392218232 Solving 0.2222222222 + x = 1.392218232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = 1.392218232 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = 1.392218232 + -0.2222222222 x = 1.392218232 + -0.2222222222 Combine like terms: 1.392218232 + -0.2222222222 = 1.1699960098 x = 1.1699960098 Simplifying x = 1.1699960098

Subproblem 2

x + 0.2222222222 = -1.392218232 Simplifying x + 0.2222222222 = -1.392218232 Reorder the terms: 0.2222222222 + x = -1.392218232 Solving 0.2222222222 + x = -1.392218232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = -1.392218232 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = -1.392218232 + -0.2222222222 x = -1.392218232 + -0.2222222222 Combine like terms: -1.392218232 + -0.2222222222 = -1.6144404542 x = -1.6144404542 Simplifying x = -1.6144404542

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1699960098, -1.6144404542}

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