17x^2+16x-4=0

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Solution for 17x^2+16x-4=0 equation:


Simplifying
17x2 + 16x + -4 = 0

Reorder the terms:
-4 + 16x + 17x2 = 0

Solving
-4 + 16x + 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 + 0.9411764706x + x2 = 0

Move the constant term to the right:

Add '0.2352941176' to each side of the equation.
-0.2352941176 + 0.9411764706x + 0.2352941176 + x2 = 0 + 0.2352941176

Reorder the terms:
-0.2352941176 + 0.2352941176 + 0.9411764706x + x2 = 0 + 0.2352941176

Combine like terms: -0.2352941176 + 0.2352941176 = 0.0000000000
0.0000000000 + 0.9411764706x + x2 = 0 + 0.2352941176
0.9411764706x + x2 = 0 + 0.2352941176

Combine like terms: 0 + 0.2352941176 = 0.2352941176
0.9411764706x + x2 = 0.2352941176

The x term is 0.9411764706x.  Take half its coefficient (0.4705882353).
Square it (0.2214532872) and add it to both sides.

Add '0.2214532872' to each side of the equation.
0.9411764706x + 0.2214532872 + x2 = 0.2352941176 + 0.2214532872

Reorder the terms:
0.2214532872 + 0.9411764706x + x2 = 0.2352941176 + 0.2214532872

Combine like terms: 0.2352941176 + 0.2214532872 = 0.4567474048
0.2214532872 + 0.9411764706x + x2 = 0.4567474048

Factor a perfect square on the left side:
(x + 0.4705882353)(x + 0.4705882353) = 0.4567474048

Calculate the square root of the right side: 0.6758309

Break this problem into two subproblems by setting 
(x + 0.4705882353) equal to 0.6758309 and -0.6758309.

Subproblem 1

x + 0.4705882353 = 0.6758309 Simplifying x + 0.4705882353 = 0.6758309 Reorder the terms: 0.4705882353 + x = 0.6758309 Solving 0.4705882353 + x = 0.6758309 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4705882353' to each side of the equation. 0.4705882353 + -0.4705882353 + x = 0.6758309 + -0.4705882353 Combine like terms: 0.4705882353 + -0.4705882353 = 0.0000000000 0.0000000000 + x = 0.6758309 + -0.4705882353 x = 0.6758309 + -0.4705882353 Combine like terms: 0.6758309 + -0.4705882353 = 0.2052426647 x = 0.2052426647 Simplifying x = 0.2052426647

Subproblem 2

x + 0.4705882353 = -0.6758309 Simplifying x + 0.4705882353 = -0.6758309 Reorder the terms: 0.4705882353 + x = -0.6758309 Solving 0.4705882353 + x = -0.6758309 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4705882353' to each side of the equation. 0.4705882353 + -0.4705882353 + x = -0.6758309 + -0.4705882353 Combine like terms: 0.4705882353 + -0.4705882353 = 0.0000000000 0.0000000000 + x = -0.6758309 + -0.4705882353 x = -0.6758309 + -0.4705882353 Combine like terms: -0.6758309 + -0.4705882353 = -1.1464191353 x = -1.1464191353 Simplifying x = -1.1464191353

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2052426647, -1.1464191353}

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