x^2+2x+2=800

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Solution for x^2+2x+2=800 equation:


Simplifying
x2 + 2x + 2 = 800

Reorder the terms:
2 + 2x + x2 = 800

Solving
2 + 2x + x2 = 800

Solving for variable 'x'.

Reorder the terms:
2 + -800 + 2x + x2 = 800 + -800

Combine like terms: 2 + -800 = -798
-798 + 2x + x2 = 800 + -800

Combine like terms: 800 + -800 = 0
-798 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '798' to each side of the equation.
-798 + 2x + 798 + x2 = 0 + 798

Reorder the terms:
-798 + 798 + 2x + x2 = 0 + 798

Combine like terms: -798 + 798 = 0
0 + 2x + x2 = 0 + 798
2x + x2 = 0 + 798

Combine like terms: 0 + 798 = 798
2x + x2 = 798

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 = 798 + 1

Reorder the terms:
1 + 2x + x2 = 798 + 1

Combine like terms: 798 + 1 = 799
1 + 2x + x2 = 799

Factor a perfect square on the left side:
(x + 1)(x + 1) = 799

Calculate the square root of the right side: 28.26658805

Break this problem into two subproblems by setting 
(x + 1) equal to 28.26658805 and -28.26658805.

Subproblem 1

x + 1 = 28.26658805 Simplifying x + 1 = 28.26658805 Reorder the terms: 1 + x = 28.26658805 Solving 1 + x = 28.26658805 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 = 28.26658805 + -1 Combine like terms: 1 + -1 = 0 0 + x = 28.26658805 + -1 x = 28.26658805 + -1 Combine like terms: 28.26658805 + -1 = 27.26658805 x = 27.26658805 Simplifying x = 27.26658805

Subproblem 2

x + 1 = -28.26658805 Simplifying x + 1 = -28.26658805 Reorder the terms: 1 + x = -28.26658805 Solving 1 + x = -28.26658805 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 = -28.26658805 + -1 Combine like terms: 1 + -1 = 0 0 + x = -28.26658805 + -1 x = -28.26658805 + -1 Combine like terms: -28.26658805 + -1 = -29.26658805 x = -29.26658805 Simplifying x = -29.26658805

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.26658805, -29.26658805}

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