5x^2+22x-1=0

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Solution for 5x^2+22x-1=0 equation:


Simplifying
5x2 + 22x + -1 = 0

Reorder the terms:
-1 + 22x + 5x2 = 0

Solving
-1 + 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'.
-0.2 + 4.4x + x2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + 4.4x + 0.2 + x2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + 4.4x + x2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 4.4x + x2 = 0 + 0.2
4.4x + x2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
4.4x + x2 = 0.2

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 = 0.2 + 4.84

Reorder the terms:
4.84 + 4.4x + x2 = 0.2 + 4.84

Combine like terms: 0.2 + 4.84 = 5.04
4.84 + 4.4x + x2 = 5.04

Factor a perfect square on the left side:
(x + 2.2)(x + 2.2) = 5.04

Calculate the square root of the right side: 2.244994432

Break this problem into two subproblems by setting 
(x + 2.2) equal to 2.244994432 and -2.244994432.

Subproblem 1

x + 2.2 = 2.244994432 Simplifying x + 2.2 = 2.244994432 Reorder the terms: 2.2 + x = 2.244994432 Solving 2.2 + x = 2.244994432 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 = 2.244994432 + -2.2 Combine like terms: 2.2 + -2.2 = 0.0 0.0 + x = 2.244994432 + -2.2 x = 2.244994432 + -2.2 Combine like terms: 2.244994432 + -2.2 = 0.044994432 x = 0.044994432 Simplifying x = 0.044994432

Subproblem 2

x + 2.2 = -2.244994432 Simplifying x + 2.2 = -2.244994432 Reorder the terms: 2.2 + x = -2.244994432 Solving 2.2 + x = -2.244994432 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 = -2.244994432 + -2.2 Combine like terms: 2.2 + -2.2 = 0.0 0.0 + x = -2.244994432 + -2.2 x = -2.244994432 + -2.2 Combine like terms: -2.244994432 + -2.2 = -4.444994432 x = -4.444994432 Simplifying x = -4.444994432

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.044994432, -4.444994432}

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