11x^2+6x^2+8x-2=0

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Solution for 11x^2+6x^2+8x-2=0 equation:


Simplifying
11x2 + 6x2 + 8x + -2 = 0

Reorder the terms:
-2 + 8x + 11x2 + 6x2 = 0

Combine like terms: 11x2 + 6x2 = 17x2
-2 + 8x + 17x2 = 0

Solving
-2 + 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'.
-0.1176470588 + 0.4705882353x + x2 = 0

Move the constant term to the right:

Add '0.1176470588' to each side of the equation.
-0.1176470588 + 0.4705882353x + 0.1176470588 + x2 = 0 + 0.1176470588

Reorder the terms:
-0.1176470588 + 0.1176470588 + 0.4705882353x + x2 = 0 + 0.1176470588

Combine like terms: -0.1176470588 + 0.1176470588 = 0.0000000000
0.0000000000 + 0.4705882353x + x2 = 0 + 0.1176470588
0.4705882353x + x2 = 0 + 0.1176470588

Combine like terms: 0 + 0.1176470588 = 0.1176470588
0.4705882353x + x2 = 0.1176470588

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 = 0.1176470588 + 0.05536332182

Reorder the terms:
0.05536332182 + 0.4705882353x + x2 = 0.1176470588 + 0.05536332182

Combine like terms: 0.1176470588 + 0.05536332182 = 0.17301038062
0.05536332182 + 0.4705882353x + x2 = 0.17301038062

Factor a perfect square on the left side:
(x + 0.2352941177)(x + 0.2352941177) = 0.17301038062

Calculate the square root of the right side: 0.415945165

Break this problem into two subproblems by setting 
(x + 0.2352941177) equal to 0.415945165 and -0.415945165.

Subproblem 1

x + 0.2352941177 = 0.415945165 Simplifying x + 0.2352941177 = 0.415945165 Reorder the terms: 0.2352941177 + x = 0.415945165 Solving 0.2352941177 + x = 0.415945165 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 = 0.415945165 + -0.2352941177 Combine like terms: 0.2352941177 + -0.2352941177 = 0.0000000000 0.0000000000 + x = 0.415945165 + -0.2352941177 x = 0.415945165 + -0.2352941177 Combine like terms: 0.415945165 + -0.2352941177 = 0.1806510473 x = 0.1806510473 Simplifying x = 0.1806510473

Subproblem 2

x + 0.2352941177 = -0.415945165 Simplifying x + 0.2352941177 = -0.415945165 Reorder the terms: 0.2352941177 + x = -0.415945165 Solving 0.2352941177 + x = -0.415945165 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 = -0.415945165 + -0.2352941177 Combine like terms: 0.2352941177 + -0.2352941177 = 0.0000000000 0.0000000000 + x = -0.415945165 + -0.2352941177 x = -0.415945165 + -0.2352941177 Combine like terms: -0.415945165 + -0.2352941177 = -0.6512392827 x = -0.6512392827 Simplifying x = -0.6512392827

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.1806510473, -0.6512392827}

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