344=x^2+2x

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Solution for 344=x^2+2x equation:


Simplifying
344 = x2 + 2x

Reorder the terms:
344 = 2x + x2

Solving
344 = 2x + x2

Solving for variable 'x'.

Reorder the terms:
344 + -2x + -1x2 = 2x + -2x + x2 + -1x2

Combine like terms: 2x + -2x = 0
344 + -2x + -1x2 = 0 + x2 + -1x2
344 + -2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
344 + -2x + -1x2 = 0

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

Divide each side by '-1'.
-344 + 2x + x2 = 0

Move the constant term to the right:

Add '344' to each side of the equation.
-344 + 2x + 344 + x2 = 0 + 344

Reorder the terms:
-344 + 344 + 2x + x2 = 0 + 344

Combine like terms: -344 + 344 = 0
0 + 2x + x2 = 0 + 344
2x + x2 = 0 + 344

Combine like terms: 0 + 344 = 344
2x + x2 = 344

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 = 344 + 1

Reorder the terms:
1 + 2x + x2 = 344 + 1

Combine like terms: 344 + 1 = 345
1 + 2x + x2 = 345

Factor a perfect square on the left side:
(x + 1)(x + 1) = 345

Calculate the square root of the right side: 18.574175621

Break this problem into two subproblems by setting 
(x + 1) equal to 18.574175621 and -18.574175621.

Subproblem 1

x + 1 = 18.574175621 Simplifying x + 1 = 18.574175621 Reorder the terms: 1 + x = 18.574175621 Solving 1 + x = 18.574175621 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 = 18.574175621 + -1 Combine like terms: 1 + -1 = 0 0 + x = 18.574175621 + -1 x = 18.574175621 + -1 Combine like terms: 18.574175621 + -1 = 17.574175621 x = 17.574175621 Simplifying x = 17.574175621

Subproblem 2

x + 1 = -18.574175621 Simplifying x + 1 = -18.574175621 Reorder the terms: 1 + x = -18.574175621 Solving 1 + x = -18.574175621 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 = -18.574175621 + -1 Combine like terms: 1 + -1 = 0 0 + x = -18.574175621 + -1 x = -18.574175621 + -1 Combine like terms: -18.574175621 + -1 = -19.574175621 x = -19.574175621 Simplifying x = -19.574175621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.574175621, -19.574175621}

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