17x^2-15x-4=0

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Solution for 17x^2-15x-4=0 equation:


Simplifying
17x2 + -15x + -4 = 0

Reorder the terms:
-4 + -15x + 17x2 = 0

Solving
-4 + -15x + 17x2 = 0

Solving for variable 'x'.

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

Divide each side by '17'.
-0.2352941176 + -0.8823529412x + x2 = 0

Move the constant term to the right:

Add '0.2352941176' to each side of the equation.
-0.2352941176 + -0.8823529412x + 0.2352941176 + x2 = 0 + 0.2352941176

Reorder the terms:
-0.2352941176 + 0.2352941176 + -0.8823529412x + x2 = 0 + 0.2352941176

Combine like terms: -0.2352941176 + 0.2352941176 = 0.0000000000
0.0000000000 + -0.8823529412x + x2 = 0 + 0.2352941176
-0.8823529412x + x2 = 0 + 0.2352941176

Combine like terms: 0 + 0.2352941176 = 0.2352941176
-0.8823529412x + x2 = 0.2352941176

The x term is -0.8823529412x.  Take half its coefficient (-0.4411764706).
Square it (0.1946366782) and add it to both sides.

Add '0.1946366782' to each side of the equation.
-0.8823529412x + 0.1946366782 + x2 = 0.2352941176 + 0.1946366782

Reorder the terms:
0.1946366782 + -0.8823529412x + x2 = 0.2352941176 + 0.1946366782

Combine like terms: 0.2352941176 + 0.1946366782 = 0.4299307958
0.1946366782 + -0.8823529412x + x2 = 0.4299307958

Factor a perfect square on the left side:
(x + -0.4411764706)(x + -0.4411764706) = 0.4299307958

Calculate the square root of the right side: 0.655691083

Break this problem into two subproblems by setting 
(x + -0.4411764706) equal to 0.655691083 and -0.655691083.

Subproblem 1

x + -0.4411764706 = 0.655691083 Simplifying x + -0.4411764706 = 0.655691083 Reorder the terms: -0.4411764706 + x = 0.655691083 Solving -0.4411764706 + x = 0.655691083 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4411764706' to each side of the equation. -0.4411764706 + 0.4411764706 + x = 0.655691083 + 0.4411764706 Combine like terms: -0.4411764706 + 0.4411764706 = 0.0000000000 0.0000000000 + x = 0.655691083 + 0.4411764706 x = 0.655691083 + 0.4411764706 Combine like terms: 0.655691083 + 0.4411764706 = 1.0968675536 x = 1.0968675536 Simplifying x = 1.0968675536

Subproblem 2

x + -0.4411764706 = -0.655691083 Simplifying x + -0.4411764706 = -0.655691083 Reorder the terms: -0.4411764706 + x = -0.655691083 Solving -0.4411764706 + x = -0.655691083 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4411764706' to each side of the equation. -0.4411764706 + 0.4411764706 + x = -0.655691083 + 0.4411764706 Combine like terms: -0.4411764706 + 0.4411764706 = 0.0000000000 0.0000000000 + x = -0.655691083 + 0.4411764706 x = -0.655691083 + 0.4411764706 Combine like terms: -0.655691083 + 0.4411764706 = -0.2145146124 x = -0.2145146124 Simplifying x = -0.2145146124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0968675536, -0.2145146124}

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