11x^2+34x-55=0

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Solution for 11x^2+34x-55=0 equation:


Simplifying
11x2 + 34x + -55 = 0

Reorder the terms:
-55 + 34x + 11x2 = 0

Solving
-55 + 34x + 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'.
-5 + 3.090909091x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 3.090909091x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + 3.090909091x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 3.090909091x + x2 = 0 + 5
3.090909091x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
3.090909091x + x2 = 5

The x term is 3.090909091x.  Take half its coefficient (1.545454546).
Square it (2.388429754) and add it to both sides.

Add '2.388429754' to each side of the equation.
3.090909091x + 2.388429754 + x2 = 5 + 2.388429754

Reorder the terms:
2.388429754 + 3.090909091x + x2 = 5 + 2.388429754

Combine like terms: 5 + 2.388429754 = 7.388429754
2.388429754 + 3.090909091x + x2 = 7.388429754

Factor a perfect square on the left side:
(x + 1.545454546)(x + 1.545454546) = 7.388429754

Calculate the square root of the right side: 2.718166616

Break this problem into two subproblems by setting 
(x + 1.545454546) equal to 2.718166616 and -2.718166616.

Subproblem 1

x + 1.545454546 = 2.718166616 Simplifying x + 1.545454546 = 2.718166616 Reorder the terms: 1.545454546 + x = 2.718166616 Solving 1.545454546 + x = 2.718166616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.545454546' to each side of the equation. 1.545454546 + -1.545454546 + x = 2.718166616 + -1.545454546 Combine like terms: 1.545454546 + -1.545454546 = 0.000000000 0.000000000 + x = 2.718166616 + -1.545454546 x = 2.718166616 + -1.545454546 Combine like terms: 2.718166616 + -1.545454546 = 1.17271207 x = 1.17271207 Simplifying x = 1.17271207

Subproblem 2

x + 1.545454546 = -2.718166616 Simplifying x + 1.545454546 = -2.718166616 Reorder the terms: 1.545454546 + x = -2.718166616 Solving 1.545454546 + x = -2.718166616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.545454546' to each side of the equation. 1.545454546 + -1.545454546 + x = -2.718166616 + -1.545454546 Combine like terms: 1.545454546 + -1.545454546 = 0.000000000 0.000000000 + x = -2.718166616 + -1.545454546 x = -2.718166616 + -1.545454546 Combine like terms: -2.718166616 + -1.545454546 = -4.263621162 x = -4.263621162 Simplifying x = -4.263621162

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.17271207, -4.263621162}

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