11x^2-4x=12

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Solution for 11x^2-4x=12 equation:


Simplifying
11x2 + -4x = 12

Reorder the terms:
-4x + 11x2 = 12

Solving
-4x + 11x2 = 12

Solving for variable 'x'.

Reorder the terms:
-12 + -4x + 11x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + -4x + 11x2 = 0

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

Divide each side by '11'.
-1.090909091 + -0.3636363636x + x2 = 0

Move the constant term to the right:

Add '1.090909091' to each side of the equation.
-1.090909091 + -0.3636363636x + 1.090909091 + x2 = 0 + 1.090909091

Reorder the terms:
-1.090909091 + 1.090909091 + -0.3636363636x + x2 = 0 + 1.090909091

Combine like terms: -1.090909091 + 1.090909091 = 0.000000000
0.000000000 + -0.3636363636x + x2 = 0 + 1.090909091
-0.3636363636x + x2 = 0 + 1.090909091

Combine like terms: 0 + 1.090909091 = 1.090909091
-0.3636363636x + x2 = 1.090909091

The x term is -0.3636363636x.  Take half its coefficient (-0.1818181818).
Square it (0.03305785123) and add it to both sides.

Add '0.03305785123' to each side of the equation.
-0.3636363636x + 0.03305785123 + x2 = 1.090909091 + 0.03305785123

Reorder the terms:
0.03305785123 + -0.3636363636x + x2 = 1.090909091 + 0.03305785123

Combine like terms: 1.090909091 + 0.03305785123 = 1.12396694223
0.03305785123 + -0.3636363636x + x2 = 1.12396694223

Factor a perfect square on the left side:
(x + -0.1818181818)(x + -0.1818181818) = 1.12396694223

Calculate the square root of the right side: 1.060173072

Break this problem into two subproblems by setting 
(x + -0.1818181818) equal to 1.060173072 and -1.060173072.

Subproblem 1

x + -0.1818181818 = 1.060173072 Simplifying x + -0.1818181818 = 1.060173072 Reorder the terms: -0.1818181818 + x = 1.060173072 Solving -0.1818181818 + x = 1.060173072 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1818181818' to each side of the equation. -0.1818181818 + 0.1818181818 + x = 1.060173072 + 0.1818181818 Combine like terms: -0.1818181818 + 0.1818181818 = 0.0000000000 0.0000000000 + x = 1.060173072 + 0.1818181818 x = 1.060173072 + 0.1818181818 Combine like terms: 1.060173072 + 0.1818181818 = 1.2419912538 x = 1.2419912538 Simplifying x = 1.2419912538

Subproblem 2

x + -0.1818181818 = -1.060173072 Simplifying x + -0.1818181818 = -1.060173072 Reorder the terms: -0.1818181818 + x = -1.060173072 Solving -0.1818181818 + x = -1.060173072 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1818181818' to each side of the equation. -0.1818181818 + 0.1818181818 + x = -1.060173072 + 0.1818181818 Combine like terms: -0.1818181818 + 0.1818181818 = 0.0000000000 0.0000000000 + x = -1.060173072 + 0.1818181818 x = -1.060173072 + 0.1818181818 Combine like terms: -1.060173072 + 0.1818181818 = -0.8783548902 x = -0.8783548902 Simplifying x = -0.8783548902

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2419912538, -0.8783548902}

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