11x^2-x-4=0

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Solution for 11x^2-x-4=0 equation:


Simplifying
11x2 + -1x + -4 = 0

Reorder the terms:
-4 + -1x + 11x2 = 0

Solving
-4 + -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'.
-0.3636363636 + -0.09090909091x + x2 = 0

Move the constant term to the right:

Add '0.3636363636' to each side of the equation.
-0.3636363636 + -0.09090909091x + 0.3636363636 + x2 = 0 + 0.3636363636

Reorder the terms:
-0.3636363636 + 0.3636363636 + -0.09090909091x + x2 = 0 + 0.3636363636

Combine like terms: -0.3636363636 + 0.3636363636 = 0.0000000000
0.0000000000 + -0.09090909091x + x2 = 0 + 0.3636363636
-0.09090909091x + x2 = 0 + 0.3636363636

Combine like terms: 0 + 0.3636363636 = 0.3636363636
-0.09090909091x + x2 = 0.3636363636

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 = 0.3636363636 + 0.002066115703

Reorder the terms:
0.002066115703 + -0.09090909091x + x2 = 0.3636363636 + 0.002066115703

Combine like terms: 0.3636363636 + 0.002066115703 = 0.365702479303
0.002066115703 + -0.09090909091x + x2 = 0.365702479303

Factor a perfect square on the left side:
(x + -0.04545454546)(x + -0.04545454546) = 0.365702479303

Calculate the square root of the right side: 0.604733395

Break this problem into two subproblems by setting 
(x + -0.04545454546) equal to 0.604733395 and -0.604733395.

Subproblem 1

x + -0.04545454546 = 0.604733395 Simplifying x + -0.04545454546 = 0.604733395 Reorder the terms: -0.04545454546 + x = 0.604733395 Solving -0.04545454546 + x = 0.604733395 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 = 0.604733395 + 0.04545454546 Combine like terms: -0.04545454546 + 0.04545454546 = 0.00000000000 0.00000000000 + x = 0.604733395 + 0.04545454546 x = 0.604733395 + 0.04545454546 Combine like terms: 0.604733395 + 0.04545454546 = 0.65018794046 x = 0.65018794046 Simplifying x = 0.65018794046

Subproblem 2

x + -0.04545454546 = -0.604733395 Simplifying x + -0.04545454546 = -0.604733395 Reorder the terms: -0.04545454546 + x = -0.604733395 Solving -0.04545454546 + x = -0.604733395 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 = -0.604733395 + 0.04545454546 Combine like terms: -0.04545454546 + 0.04545454546 = 0.00000000000 0.00000000000 + x = -0.604733395 + 0.04545454546 x = -0.604733395 + 0.04545454546 Combine like terms: -0.604733395 + 0.04545454546 = -0.55927884954 x = -0.55927884954 Simplifying x = -0.55927884954

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.65018794046, -0.55927884954}

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