200=2*3.14*X^2+2*3.14*X*6

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Solution for 200=2*3.14*X^2+2*3.14*X*6 equation:


Simplifying
200 = 2 * 3.14X2 + 2 * 3.14X * 6

Multiply 2 * 3.14
200 = 6.28X2 + 2 * 3.14X * 6

Reorder the terms for easier multiplication:
200 = 6.28X2 + 2 * 3.14 * 6X

Multiply 2 * 3.14
200 = 6.28X2 + 6.28 * 6X

Multiply 6.28 * 6
200 = 6.28X2 + 37.68X

Reorder the terms:
200 = 37.68X + 6.28X2

Solving
200 = 37.68X + 6.28X2

Solving for variable 'X'.

Reorder the terms:
200 + -37.68X + -6.28X2 = 37.68X + -37.68X + 6.28X2 + -6.28X2

Combine like terms: 37.68X + -37.68X = 0.00
200 + -37.68X + -6.28X2 = 0.00 + 6.28X2 + -6.28X2
200 + -37.68X + -6.28X2 = 6.28X2 + -6.28X2

Combine like terms: 6.28X2 + -6.28X2 = 0.00
200 + -37.68X + -6.28X2 = 0.00

Begin completing the square.  Divide all terms by
-6.28 the coefficient of the squared term: 

Divide each side by '-6.28'.
-31.84713376 + 6X + X2 = 0

Move the constant term to the right:

Add '31.84713376' to each side of the equation.
-31.84713376 + 6X + 31.84713376 + X2 = 0 + 31.84713376

Reorder the terms:
-31.84713376 + 31.84713376 + 6X + X2 = 0 + 31.84713376

Combine like terms: -31.84713376 + 31.84713376 = 0.00000000
0.00000000 + 6X + X2 = 0 + 31.84713376
6X + X2 = 0 + 31.84713376

Combine like terms: 0 + 31.84713376 = 31.84713376
6X + X2 = 31.84713376

The X term is 6X.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6X + 9 + X2 = 31.84713376 + 9

Reorder the terms:
9 + 6X + X2 = 31.84713376 + 9

Combine like terms: 31.84713376 + 9 = 40.84713376
9 + 6X + X2 = 40.84713376

Factor a perfect square on the left side:
(X + 3)(X + 3) = 40.84713376

Calculate the square root of the right side: 6.391176242

Break this problem into two subproblems by setting 
(X + 3) equal to 6.391176242 and -6.391176242.

Subproblem 1

X + 3 = 6.391176242 Simplifying X + 3 = 6.391176242 Reorder the terms: 3 + X = 6.391176242 Solving 3 + X = 6.391176242 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + X = 6.391176242 + -3 Combine like terms: 3 + -3 = 0 0 + X = 6.391176242 + -3 X = 6.391176242 + -3 Combine like terms: 6.391176242 + -3 = 3.391176242 X = 3.391176242 Simplifying X = 3.391176242

Subproblem 2

X + 3 = -6.391176242 Simplifying X + 3 = -6.391176242 Reorder the terms: 3 + X = -6.391176242 Solving 3 + X = -6.391176242 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + X = -6.391176242 + -3 Combine like terms: 3 + -3 = 0 0 + X = -6.391176242 + -3 X = -6.391176242 + -3 Combine like terms: -6.391176242 + -3 = -9.391176242 X = -9.391176242 Simplifying X = -9.391176242

Solution

The solution to the problem is based on the solutions from the subproblems. X = {3.391176242, -9.391176242}

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