10x^2-11x-2=0

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Solution for 10x^2-11x-2=0 equation:


Simplifying
10x2 + -11x + -2 = 0

Reorder the terms:
-2 + -11x + 10x2 = 0

Solving
-2 + -11x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-0.2 + -1.1x + x2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + -1.1x + 0.2 + x2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + -1.1x + x2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + -1.1x + x2 = 0 + 0.2
-1.1x + x2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
-1.1x + x2 = 0.2

The x term is -1.1x.  Take half its coefficient (-0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
-1.1x + 0.3025 + x2 = 0.2 + 0.3025

Reorder the terms:
0.3025 + -1.1x + x2 = 0.2 + 0.3025

Combine like terms: 0.2 + 0.3025 = 0.5025
0.3025 + -1.1x + x2 = 0.5025

Factor a perfect square on the left side:
(x + -0.55)(x + -0.55) = 0.5025

Calculate the square root of the right side: 0.708872344

Break this problem into two subproblems by setting 
(x + -0.55) equal to 0.708872344 and -0.708872344.

Subproblem 1

x + -0.55 = 0.708872344 Simplifying x + -0.55 = 0.708872344 Reorder the terms: -0.55 + x = 0.708872344 Solving -0.55 + x = 0.708872344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + x = 0.708872344 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = 0.708872344 + 0.55 x = 0.708872344 + 0.55 Combine like terms: 0.708872344 + 0.55 = 1.258872344 x = 1.258872344 Simplifying x = 1.258872344

Subproblem 2

x + -0.55 = -0.708872344 Simplifying x + -0.55 = -0.708872344 Reorder the terms: -0.55 + x = -0.708872344 Solving -0.55 + x = -0.708872344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + x = -0.708872344 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + x = -0.708872344 + 0.55 x = -0.708872344 + 0.55 Combine like terms: -0.708872344 + 0.55 = -0.158872344 x = -0.158872344 Simplifying x = -0.158872344

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.258872344, -0.158872344}

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