X^2+2X-200=0

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Solution for X^2+2X-200=0 equation:


Simplifying
X2 + 2X + -200 = 0

Reorder the terms:
-200 + 2X + X2 = 0

Solving
-200 + 2X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '200' to each side of the equation.
-200 + 2X + 200 + X2 = 0 + 200

Reorder the terms:
-200 + 200 + 2X + X2 = 0 + 200

Combine like terms: -200 + 200 = 0
0 + 2X + X2 = 0 + 200
2X + X2 = 0 + 200

Combine like terms: 0 + 200 = 200
2X + X2 = 200

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 = 200 + 1

Reorder the terms:
1 + 2X + X2 = 200 + 1

Combine like terms: 200 + 1 = 201
1 + 2X + X2 = 201

Factor a perfect square on the left side:
(X + 1)(X + 1) = 201

Calculate the square root of the right side: 14.177446879

Break this problem into two subproblems by setting 
(X + 1) equal to 14.177446879 and -14.177446879.

Subproblem 1

X + 1 = 14.177446879 Simplifying X + 1 = 14.177446879 Reorder the terms: 1 + X = 14.177446879 Solving 1 + X = 14.177446879 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 = 14.177446879 + -1 Combine like terms: 1 + -1 = 0 0 + X = 14.177446879 + -1 X = 14.177446879 + -1 Combine like terms: 14.177446879 + -1 = 13.177446879 X = 13.177446879 Simplifying X = 13.177446879

Subproblem 2

X + 1 = -14.177446879 Simplifying X + 1 = -14.177446879 Reorder the terms: 1 + X = -14.177446879 Solving 1 + X = -14.177446879 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 = -14.177446879 + -1 Combine like terms: 1 + -1 = 0 0 + X = -14.177446879 + -1 X = -14.177446879 + -1 Combine like terms: -14.177446879 + -1 = -15.177446879 X = -15.177446879 Simplifying X = -15.177446879

Solution

The solution to the problem is based on the solutions from the subproblems. X = {13.177446879, -15.177446879}

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