11x^2-22x-5=0

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Solution for 11x^2-22x-5=0 equation:


Simplifying
11x2 + -22x + -5 = 0

Reorder the terms:
-5 + -22x + 11x2 = 0

Solving
-5 + -22x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-0.4545454545 + -2x + x2 = 0

Move the constant term to the right:

Add '0.4545454545' to each side of the equation.
-0.4545454545 + -2x + 0.4545454545 + x2 = 0 + 0.4545454545

Reorder the terms:
-0.4545454545 + 0.4545454545 + -2x + x2 = 0 + 0.4545454545

Combine like terms: -0.4545454545 + 0.4545454545 = 0.0000000000
0.0000000000 + -2x + x2 = 0 + 0.4545454545
-2x + x2 = 0 + 0.4545454545

Combine like terms: 0 + 0.4545454545 = 0.4545454545
-2x + x2 = 0.4545454545

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 0.4545454545 + 1

Reorder the terms:
1 + -2x + x2 = 0.4545454545 + 1

Combine like terms: 0.4545454545 + 1 = 1.4545454545
1 + -2x + x2 = 1.4545454545

Factor a perfect square on the left side:
(x + -1)(x + -1) = 1.4545454545

Calculate the square root of the right side: 1.206045378

Break this problem into two subproblems by setting 
(x + -1) equal to 1.206045378 and -1.206045378.

Subproblem 1

x + -1 = 1.206045378 Simplifying x + -1 = 1.206045378 Reorder the terms: -1 + x = 1.206045378 Solving -1 + x = 1.206045378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.206045378 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.206045378 + 1 x = 1.206045378 + 1 Combine like terms: 1.206045378 + 1 = 2.206045378 x = 2.206045378 Simplifying x = 2.206045378

Subproblem 2

x + -1 = -1.206045378 Simplifying x + -1 = -1.206045378 Reorder the terms: -1 + x = -1.206045378 Solving -1 + x = -1.206045378 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.206045378 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.206045378 + 1 x = -1.206045378 + 1 Combine like terms: -1.206045378 + 1 = -0.206045378 x = -0.206045378 Simplifying x = -0.206045378

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.206045378, -0.206045378}

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