17x^2-16x-12=0

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Solution for 17x^2-16x-12=0 equation:


Simplifying
17x2 + -16x + -12 = 0

Reorder the terms:
-12 + -16x + 17x2 = 0

Solving
-12 + -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'.
-0.7058823529 + -0.9411764706x + x2 = 0

Move the constant term to the right:

Add '0.7058823529' to each side of the equation.
-0.7058823529 + -0.9411764706x + 0.7058823529 + x2 = 0 + 0.7058823529

Reorder the terms:
-0.7058823529 + 0.7058823529 + -0.9411764706x + x2 = 0 + 0.7058823529

Combine like terms: -0.7058823529 + 0.7058823529 = 0.0000000000
0.0000000000 + -0.9411764706x + x2 = 0 + 0.7058823529
-0.9411764706x + x2 = 0 + 0.7058823529

Combine like terms: 0 + 0.7058823529 = 0.7058823529
-0.9411764706x + x2 = 0.7058823529

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 = 0.7058823529 + 0.2214532872

Reorder the terms:
0.2214532872 + -0.9411764706x + x2 = 0.7058823529 + 0.2214532872

Combine like terms: 0.7058823529 + 0.2214532872 = 0.9273356401
0.2214532872 + -0.9411764706x + x2 = 0.9273356401

Factor a perfect square on the left side:
(x + -0.4705882353)(x + -0.4705882353) = 0.9273356401

Calculate the square root of the right side: 0.962982679

Break this problem into two subproblems by setting 
(x + -0.4705882353) equal to 0.962982679 and -0.962982679.

Subproblem 1

x + -0.4705882353 = 0.962982679 Simplifying x + -0.4705882353 = 0.962982679 Reorder the terms: -0.4705882353 + x = 0.962982679 Solving -0.4705882353 + x = 0.962982679 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 = 0.962982679 + 0.4705882353 Combine like terms: -0.4705882353 + 0.4705882353 = 0.0000000000 0.0000000000 + x = 0.962982679 + 0.4705882353 x = 0.962982679 + 0.4705882353 Combine like terms: 0.962982679 + 0.4705882353 = 1.4335709143 x = 1.4335709143 Simplifying x = 1.4335709143

Subproblem 2

x + -0.4705882353 = -0.962982679 Simplifying x + -0.4705882353 = -0.962982679 Reorder the terms: -0.4705882353 + x = -0.962982679 Solving -0.4705882353 + x = -0.962982679 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 = -0.962982679 + 0.4705882353 Combine like terms: -0.4705882353 + 0.4705882353 = 0.0000000000 0.0000000000 + x = -0.962982679 + 0.4705882353 x = -0.962982679 + 0.4705882353 Combine like terms: -0.962982679 + 0.4705882353 = -0.4923944437 x = -0.4923944437 Simplifying x = -0.4923944437

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.4335709143, -0.4923944437}

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