11x^2-x-11=0

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


Simplifying
11x2 + -1x + -11 = 0

Reorder the terms:
-11 + -1x + 11x2 = 0

Solving
-11 + -1x + 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'.
-1 + -0.09090909091x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.09090909091x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.09090909091x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.09090909091x + x2 = 0 + 1
-0.09090909091x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.09090909091x + x2 = 1

The x term is -0.09090909091x.  Take half its coefficient (-0.04545454546).
Square it (0.002066115703) and add it to both sides.

Add '0.002066115703' to each side of the equation.
-0.09090909091x + 0.002066115703 + x2 = 1 + 0.002066115703

Reorder the terms:
0.002066115703 + -0.09090909091x + x2 = 1 + 0.002066115703

Combine like terms: 1 + 0.002066115703 = 1.002066115703
0.002066115703 + -0.09090909091x + x2 = 1.002066115703

Factor a perfect square on the left side:
(x + -0.04545454546)(x + -0.04545454546) = 1.002066115703

Calculate the square root of the right side: 1.001032525

Break this problem into two subproblems by setting 
(x + -0.04545454546) equal to 1.001032525 and -1.001032525.

Subproblem 1

x + -0.04545454546 = 1.001032525 Simplifying x + -0.04545454546 = 1.001032525 Reorder the terms: -0.04545454546 + x = 1.001032525 Solving -0.04545454546 + x = 1.001032525 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04545454546' to each side of the equation. -0.04545454546 + 0.04545454546 + x = 1.001032525 + 0.04545454546 Combine like terms: -0.04545454546 + 0.04545454546 = 0.00000000000 0.00000000000 + x = 1.001032525 + 0.04545454546 x = 1.001032525 + 0.04545454546 Combine like terms: 1.001032525 + 0.04545454546 = 1.04648707046 x = 1.04648707046 Simplifying x = 1.04648707046

Subproblem 2

x + -0.04545454546 = -1.001032525 Simplifying x + -0.04545454546 = -1.001032525 Reorder the terms: -0.04545454546 + x = -1.001032525 Solving -0.04545454546 + x = -1.001032525 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.04545454546' to each side of the equation. -0.04545454546 + 0.04545454546 + x = -1.001032525 + 0.04545454546 Combine like terms: -0.04545454546 + 0.04545454546 = 0.00000000000 0.00000000000 + x = -1.001032525 + 0.04545454546 x = -1.001032525 + 0.04545454546 Combine like terms: -1.001032525 + 0.04545454546 = -0.95557797954 x = -0.95557797954 Simplifying x = -0.95557797954

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.04648707046, -0.95557797954}

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