5x^2-22x-11=0

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Solution for 5x^2-22x-11=0 equation:


Simplifying
5x2 + -22x + -11 = 0

Reorder the terms:
-11 + -22x + 5x2 = 0

Solving
-11 + -22x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-2.2 + -4.4x + x2 = 0

Move the constant term to the right:

Add '2.2' to each side of the equation.
-2.2 + -4.4x + 2.2 + x2 = 0 + 2.2

Reorder the terms:
-2.2 + 2.2 + -4.4x + x2 = 0 + 2.2

Combine like terms: -2.2 + 2.2 = 0.0
0.0 + -4.4x + x2 = 0 + 2.2
-4.4x + x2 = 0 + 2.2

Combine like terms: 0 + 2.2 = 2.2
-4.4x + x2 = 2.2

The x term is -4.4x.  Take half its coefficient (-2.2).
Square it (4.84) and add it to both sides.

Add '4.84' to each side of the equation.
-4.4x + 4.84 + x2 = 2.2 + 4.84

Reorder the terms:
4.84 + -4.4x + x2 = 2.2 + 4.84

Combine like terms: 2.2 + 4.84 = 7.04
4.84 + -4.4x + x2 = 7.04

Factor a perfect square on the left side:
(x + -2.2)(x + -2.2) = 7.04

Calculate the square root of the right side: 2.653299832

Break this problem into two subproblems by setting 
(x + -2.2) equal to 2.653299832 and -2.653299832.

Subproblem 1

x + -2.2 = 2.653299832 Simplifying x + -2.2 = 2.653299832 Reorder the terms: -2.2 + x = 2.653299832 Solving -2.2 + x = 2.653299832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + x = 2.653299832 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = 2.653299832 + 2.2 x = 2.653299832 + 2.2 Combine like terms: 2.653299832 + 2.2 = 4.853299832 x = 4.853299832 Simplifying x = 4.853299832

Subproblem 2

x + -2.2 = -2.653299832 Simplifying x + -2.2 = -2.653299832 Reorder the terms: -2.2 + x = -2.653299832 Solving -2.2 + x = -2.653299832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.2' to each side of the equation. -2.2 + 2.2 + x = -2.653299832 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + x = -2.653299832 + 2.2 x = -2.653299832 + 2.2 Combine like terms: -2.653299832 + 2.2 = -0.453299832 x = -0.453299832 Simplifying x = -0.453299832

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.853299832, -0.453299832}

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