17x^2+8x-7=0

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Solution for 17x^2+8x-7=0 equation:


Simplifying
17x2 + 8x + -7 = 0

Reorder the terms:
-7 + 8x + 17x2 = 0

Solving
-7 + 8x + 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'.
-0.4117647059 + 0.4705882353x + x2 = 0

Move the constant term to the right:

Add '0.4117647059' to each side of the equation.
-0.4117647059 + 0.4705882353x + 0.4117647059 + x2 = 0 + 0.4117647059

Reorder the terms:
-0.4117647059 + 0.4117647059 + 0.4705882353x + x2 = 0 + 0.4117647059

Combine like terms: -0.4117647059 + 0.4117647059 = 0.0000000000
0.0000000000 + 0.4705882353x + x2 = 0 + 0.4117647059
0.4705882353x + x2 = 0 + 0.4117647059

Combine like terms: 0 + 0.4117647059 = 0.4117647059
0.4705882353x + x2 = 0.4117647059

The x term is 0.4705882353x.  Take half its coefficient (0.2352941177).
Square it (0.05536332182) and add it to both sides.

Add '0.05536332182' to each side of the equation.
0.4705882353x + 0.05536332182 + x2 = 0.4117647059 + 0.05536332182

Reorder the terms:
0.05536332182 + 0.4705882353x + x2 = 0.4117647059 + 0.05536332182

Combine like terms: 0.4117647059 + 0.05536332182 = 0.46712802772
0.05536332182 + 0.4705882353x + x2 = 0.46712802772

Factor a perfect square on the left side:
(x + 0.2352941177)(x + 0.2352941177) = 0.46712802772

Calculate the square root of the right side: 0.683467649

Break this problem into two subproblems by setting 
(x + 0.2352941177) equal to 0.683467649 and -0.683467649.

Subproblem 1

x + 0.2352941177 = 0.683467649 Simplifying x + 0.2352941177 = 0.683467649 Reorder the terms: 0.2352941177 + x = 0.683467649 Solving 0.2352941177 + x = 0.683467649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2352941177' to each side of the equation. 0.2352941177 + -0.2352941177 + x = 0.683467649 + -0.2352941177 Combine like terms: 0.2352941177 + -0.2352941177 = 0.0000000000 0.0000000000 + x = 0.683467649 + -0.2352941177 x = 0.683467649 + -0.2352941177 Combine like terms: 0.683467649 + -0.2352941177 = 0.4481735313 x = 0.4481735313 Simplifying x = 0.4481735313

Subproblem 2

x + 0.2352941177 = -0.683467649 Simplifying x + 0.2352941177 = -0.683467649 Reorder the terms: 0.2352941177 + x = -0.683467649 Solving 0.2352941177 + x = -0.683467649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2352941177' to each side of the equation. 0.2352941177 + -0.2352941177 + x = -0.683467649 + -0.2352941177 Combine like terms: 0.2352941177 + -0.2352941177 = 0.0000000000 0.0000000000 + x = -0.683467649 + -0.2352941177 x = -0.683467649 + -0.2352941177 Combine like terms: -0.683467649 + -0.2352941177 = -0.9187617667 x = -0.9187617667 Simplifying x = -0.9187617667

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4481735313, -0.9187617667}

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