x^2+2x=16384

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Solution for x^2+2x=16384 equation:


Simplifying
x2 + 2x = 16384

Reorder the terms:
2x + x2 = 16384

Solving
2x + x2 = 16384

Solving for variable 'x'.

Reorder the terms:
-16384 + 2x + x2 = 16384 + -16384

Combine like terms: 16384 + -16384 = 0
-16384 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '16384' to each side of the equation.
-16384 + 2x + 16384 + x2 = 0 + 16384

Reorder the terms:
-16384 + 16384 + 2x + x2 = 0 + 16384

Combine like terms: -16384 + 16384 = 0
0 + 2x + x2 = 0 + 16384
2x + x2 = 0 + 16384

Combine like terms: 0 + 16384 = 16384
2x + x2 = 16384

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 = 16384 + 1

Reorder the terms:
1 + 2x + x2 = 16384 + 1

Combine like terms: 16384 + 1 = 16385
1 + 2x + x2 = 16385

Factor a perfect square on the left side:
(x + 1)(x + 1) = 16385

Calculate the square root of the right side: 128.00390619

Break this problem into two subproblems by setting 
(x + 1) equal to 128.00390619 and -128.00390619.

Subproblem 1

x + 1 = 128.00390619 Simplifying x + 1 = 128.00390619 Reorder the terms: 1 + x = 128.00390619 Solving 1 + x = 128.00390619 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 = 128.00390619 + -1 Combine like terms: 1 + -1 = 0 0 + x = 128.00390619 + -1 x = 128.00390619 + -1 Combine like terms: 128.00390619 + -1 = 127.00390619 x = 127.00390619 Simplifying x = 127.00390619

Subproblem 2

x + 1 = -128.00390619 Simplifying x + 1 = -128.00390619 Reorder the terms: 1 + x = -128.00390619 Solving 1 + x = -128.00390619 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 = -128.00390619 + -1 Combine like terms: 1 + -1 = 0 0 + x = -128.00390619 + -1 x = -128.00390619 + -1 Combine like terms: -128.00390619 + -1 = -129.00390619 x = -129.00390619 Simplifying x = -129.00390619

Solution

The solution to the problem is based on the solutions from the subproblems. x = {127.00390619, -129.00390619}

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