x^2+(x+2)=340

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Solution for x^2+(x+2)=340 equation:


Simplifying
x2 + (x + 2) = 340

Reorder the terms:
x2 + (2 + x) = 340

Remove parenthesis around (2 + x)
x2 + 2 + x = 340

Reorder the terms:
2 + x + x2 = 340

Solving
2 + x + x2 = 340

Solving for variable 'x'.

Reorder the terms:
2 + -340 + x + x2 = 340 + -340

Combine like terms: 2 + -340 = -338
-338 + x + x2 = 340 + -340

Combine like terms: 340 + -340 = 0
-338 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '338' to each side of the equation.
-338 + x + 338 + x2 = 0 + 338

Reorder the terms:
-338 + 338 + x + x2 = 0 + 338

Combine like terms: -338 + 338 = 0
0 + x + x2 = 0 + 338
x + x2 = 0 + 338

Combine like terms: 0 + 338 = 338
x + x2 = 338

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 338 + 0.25

Reorder the terms:
0.25 + x + x2 = 338 + 0.25

Combine like terms: 338 + 0.25 = 338.25
0.25 + x + x2 = 338.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 338.25

Calculate the square root of the right side: 18.391574158

Break this problem into two subproblems by setting 
(x + 0.5) equal to 18.391574158 and -18.391574158.

Subproblem 1

x + 0.5 = 18.391574158 Simplifying x + 0.5 = 18.391574158 Reorder the terms: 0.5 + x = 18.391574158 Solving 0.5 + x = 18.391574158 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 18.391574158 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 18.391574158 + -0.5 x = 18.391574158 + -0.5 Combine like terms: 18.391574158 + -0.5 = 17.891574158 x = 17.891574158 Simplifying x = 17.891574158

Subproblem 2

x + 0.5 = -18.391574158 Simplifying x + 0.5 = -18.391574158 Reorder the terms: 0.5 + x = -18.391574158 Solving 0.5 + x = -18.391574158 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -18.391574158 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -18.391574158 + -0.5 x = -18.391574158 + -0.5 Combine like terms: -18.391574158 + -0.5 = -18.891574158 x = -18.891574158 Simplifying x = -18.891574158

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.891574158, -18.891574158}

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