11x^2-21x-34=0

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Solution for 11x^2-21x-34=0 equation:


Simplifying
11x2 + -21x + -34 = 0

Reorder the terms:
-34 + -21x + 11x2 = 0

Solving
-34 + -21x + 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'.
-3.090909091 + -1.909090909x + x2 = 0

Move the constant term to the right:

Add '3.090909091' to each side of the equation.
-3.090909091 + -1.909090909x + 3.090909091 + x2 = 0 + 3.090909091

Reorder the terms:
-3.090909091 + 3.090909091 + -1.909090909x + x2 = 0 + 3.090909091

Combine like terms: -3.090909091 + 3.090909091 = 0.000000000
0.000000000 + -1.909090909x + x2 = 0 + 3.090909091
-1.909090909x + x2 = 0 + 3.090909091

Combine like terms: 0 + 3.090909091 = 3.090909091
-1.909090909x + x2 = 3.090909091

The x term is -1.909090909x.  Take half its coefficient (-0.9545454545).
Square it (0.9111570247) and add it to both sides.

Add '0.9111570247' to each side of the equation.
-1.909090909x + 0.9111570247 + x2 = 3.090909091 + 0.9111570247

Reorder the terms:
0.9111570247 + -1.909090909x + x2 = 3.090909091 + 0.9111570247

Combine like terms: 3.090909091 + 0.9111570247 = 4.0020661157
0.9111570247 + -1.909090909x + x2 = 4.0020661157

Factor a perfect square on the left side:
(x + -0.9545454545)(x + -0.9545454545) = 4.0020661157

Calculate the square root of the right side: 2.000516462

Break this problem into two subproblems by setting 
(x + -0.9545454545) equal to 2.000516462 and -2.000516462.

Subproblem 1

x + -0.9545454545 = 2.000516462 Simplifying x + -0.9545454545 = 2.000516462 Reorder the terms: -0.9545454545 + x = 2.000516462 Solving -0.9545454545 + x = 2.000516462 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9545454545' to each side of the equation. -0.9545454545 + 0.9545454545 + x = 2.000516462 + 0.9545454545 Combine like terms: -0.9545454545 + 0.9545454545 = 0.0000000000 0.0000000000 + x = 2.000516462 + 0.9545454545 x = 2.000516462 + 0.9545454545 Combine like terms: 2.000516462 + 0.9545454545 = 2.9550619165 x = 2.9550619165 Simplifying x = 2.9550619165

Subproblem 2

x + -0.9545454545 = -2.000516462 Simplifying x + -0.9545454545 = -2.000516462 Reorder the terms: -0.9545454545 + x = -2.000516462 Solving -0.9545454545 + x = -2.000516462 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9545454545' to each side of the equation. -0.9545454545 + 0.9545454545 + x = -2.000516462 + 0.9545454545 Combine like terms: -0.9545454545 + 0.9545454545 = 0.0000000000 0.0000000000 + x = -2.000516462 + 0.9545454545 x = -2.000516462 + 0.9545454545 Combine like terms: -2.000516462 + 0.9545454545 = -1.0459710075 x = -1.0459710075 Simplifying x = -1.0459710075

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.9550619165, -1.0459710075}

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