x^2+2x-3.2=0

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Solution for x^2+2x-3.2=0 equation:


Simplifying
x2 + 2x + -3.2 = 0

Reorder the terms:
-3.2 + 2x + x2 = 0

Solving
-3.2 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + 2x + 3.2 + x2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + 2x + x2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + 2x + x2 = 0 + 3.2
2x + x2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
2x + x2 = 3.2

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 = 3.2 + 1

Reorder the terms:
1 + 2x + x2 = 3.2 + 1

Combine like terms: 3.2 + 1 = 4.2
1 + 2x + x2 = 4.2

Factor a perfect square on the left side:
(x + 1)(x + 1) = 4.2

Calculate the square root of the right side: 2.049390153

Break this problem into two subproblems by setting 
(x + 1) equal to 2.049390153 and -2.049390153.

Subproblem 1

x + 1 = 2.049390153 Simplifying x + 1 = 2.049390153 Reorder the terms: 1 + x = 2.049390153 Solving 1 + x = 2.049390153 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 = 2.049390153 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.049390153 + -1 x = 2.049390153 + -1 Combine like terms: 2.049390153 + -1 = 1.049390153 x = 1.049390153 Simplifying x = 1.049390153

Subproblem 2

x + 1 = -2.049390153 Simplifying x + 1 = -2.049390153 Reorder the terms: 1 + x = -2.049390153 Solving 1 + x = -2.049390153 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 = -2.049390153 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.049390153 + -1 x = -2.049390153 + -1 Combine like terms: -2.049390153 + -1 = -3.049390153 x = -3.049390153 Simplifying x = -3.049390153

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.049390153, -3.049390153}

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