0=x^2+2x-.44

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Solution for 0=x^2+2x-.44 equation:


Simplifying
0 = x2 + 2x + -0.44

Reorder the terms:
0 = -0.44 + 2x + x2

Solving
0 = -0.44 + 2x + x2

Solving for variable 'x'.

Combine like terms: 0 + 0.44 = 0.44
0.44 + -2x + -1x2 = -0.44 + 2x + x2 + 0.44 + -2x + -1x2

Reorder the terms:
0.44 + -2x + -1x2 = -0.44 + 0.44 + 2x + -2x + x2 + -1x2

Combine like terms: -0.44 + 0.44 = 0.00
0.44 + -2x + -1x2 = 0.00 + 2x + -2x + x2 + -1x2
0.44 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
0.44 + -2x + -1x2 = 0 + x2 + -1x2
0.44 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0.44 + -2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-0.44 + 2x + x2 = 0

Move the constant term to the right:

Add '0.44' to each side of the equation.
-0.44 + 2x + 0.44 + x2 = 0 + 0.44

Reorder the terms:
-0.44 + 0.44 + 2x + x2 = 0 + 0.44

Combine like terms: -0.44 + 0.44 = 0.00
0.00 + 2x + x2 = 0 + 0.44
2x + x2 = 0 + 0.44

Combine like terms: 0 + 0.44 = 0.44
2x + x2 = 0.44

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.44 + 1

Reorder the terms:
1 + 2x + x2 = 0.44 + 1

Combine like terms: 0.44 + 1 = 1.44
1 + 2x + x2 = 1.44

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.44

Calculate the square root of the right side: 1.2

Break this problem into two subproblems by setting 
(x + 1) equal to 1.2 and -1.2.

Subproblem 1

x + 1 = 1.2 Simplifying x + 1 = 1.2 Reorder the terms: 1 + x = 1.2 Solving 1 + x = 1.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.2 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.2 + -1 x = 1.2 + -1 Combine like terms: 1.2 + -1 = 0.2 x = 0.2 Simplifying x = 0.2

Subproblem 2

x + 1 = -1.2 Simplifying x + 1 = -1.2 Reorder the terms: 1 + x = -1.2 Solving 1 + x = -1.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.2 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.2 + -1 x = -1.2 + -1 Combine like terms: -1.2 + -1 = -2.2 x = -2.2 Simplifying x = -2.2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2, -2.2}

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