200=(.05x^2)+2.2x+.16

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Solution for 200=(.05x^2)+2.2x+.16 equation:


Simplifying
200 = (0.05x2) + 2.2x + 0.16

Reorder the terms:
200 = 0.16 + 2.2x + (0.05x2)

Solving
200 = 0.16 + 2.2x + (0.05x2)

Solving for variable 'x'.

Combine like terms: 200 + -0.16 = 199.84
199.84 + -2.2x + (-0.05x2) = 0.16 + 2.2x + (0.05x2) + -0.16 + -2.2x + (-0.05x2)

Reorder the terms:
199.84 + -2.2x + (-0.05x2) = 0.16 + -0.16 + 2.2x + -2.2x + (0.05x2) + (-0.05x2)

Combine like terms: 0.16 + -0.16 = 0.00
199.84 + -2.2x + (-0.05x2) = 0.00 + 2.2x + -2.2x + (0.05x2) + (-0.05x2)
199.84 + -2.2x + (-0.05x2) = 2.2x + -2.2x + (0.05x2) + (-0.05x2)

Combine like terms: 2.2x + -2.2x = 0.0
199.84 + -2.2x + (-0.05x2) = 0.0 + (0.05x2) + (-0.05x2)
199.84 + -2.2x + (-0.05x2) = (0.05x2) + (-0.05x2)

Combine like terms: (0.05x2) + (-0.05x2) = 0.00
199.84 + -2.2x + (-0.05x2) = 0.00

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
-3996.8 + 44x + x2 = 0

Move the constant term to the right:

Add '3996.8' to each side of the equation.
-3996.8 + 44x + 3996.8 + x2 = 0 + 3996.8

Reorder the terms:
-3996.8 + 3996.8 + 44x + x2 = 0 + 3996.8

Combine like terms: -3996.8 + 3996.8 = 0.0
0.0 + 44x + x2 = 0 + 3996.8
44x + x2 = 0 + 3996.8

Combine like terms: 0 + 3996.8 = 3996.8
44x + x2 = 3996.8

The x term is 44x.  Take half its coefficient (22).
Square it (484) and add it to both sides.

Add '484' to each side of the equation.
44x + 484 + x2 = 3996.8 + 484

Reorder the terms:
484 + 44x + x2 = 3996.8 + 484

Combine like terms: 3996.8 + 484 = 4480.8
484 + 44x + x2 = 4480.8

Factor a perfect square on the left side:
((x) + 22)((x) + 22) = 4480.8

Calculate the square root of the right side: 66.938777999

Break this problem into two subproblems by setting 
((x) + 22) equal to 66.938777999 and -66.938777999.

Subproblem 1

(x) + 22 = 66.938777999 Simplifying (x) + 22 = 66.938777999 x + 22 = 66.938777999 Reorder the terms: 22 + x = 66.938777999 Solving 22 + x = 66.938777999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + x = 66.938777999 + -22 Combine like terms: 22 + -22 = 0 0 + x = 66.938777999 + -22 x = 66.938777999 + -22 Combine like terms: 66.938777999 + -22 = 44.938777999 x = 44.938777999 Simplifying x = 44.938777999

Subproblem 2

(x) + 22 = -66.938777999 Simplifying (x) + 22 = -66.938777999 x + 22 = -66.938777999 Reorder the terms: 22 + x = -66.938777999 Solving 22 + x = -66.938777999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + x = -66.938777999 + -22 Combine like terms: 22 + -22 = 0 0 + x = -66.938777999 + -22 x = -66.938777999 + -22 Combine like terms: -66.938777999 + -22 = -88.938777999 x = -88.938777999 Simplifying x = -88.938777999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {44.938777999, -88.938777999}

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