20=-23.944+0.199x+-0.00008x^2

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Solution for 20=-23.944+0.199x+-0.00008x^2 equation:


Simplifying
20 = -23.944 + 0.199x + -0.00008x2

Solving
20 = -23.944 + 0.199x + -0.00008x2

Solving for variable 'x'.

Combine like terms: 20 + 23.944 = 43.944
43.944 + -0.199x + 0.00008x2 = -23.944 + 0.199x + -0.00008x2 + 23.944 + -0.199x + 0.00008x2

Reorder the terms:
43.944 + -0.199x + 0.00008x2 = -23.944 + 23.944 + 0.199x + -0.199x + -0.00008x2 + 0.00008x2

Combine like terms: -23.944 + 23.944 = 0.000
43.944 + -0.199x + 0.00008x2 = 0.000 + 0.199x + -0.199x + -0.00008x2 + 0.00008x2
43.944 + -0.199x + 0.00008x2 = 0.199x + -0.199x + -0.00008x2 + 0.00008x2

Combine like terms: 0.199x + -0.199x = 0.000
43.944 + -0.199x + 0.00008x2 = 0.000 + -0.00008x2 + 0.00008x2
43.944 + -0.199x + 0.00008x2 = -0.00008x2 + 0.00008x2

Combine like terms: -0.00008x2 + 0.00008x2 = 0.00000
43.944 + -0.199x + 0.00008x2 = 0.00000

Begin completing the square.  Divide all terms by
0.00008 the coefficient of the squared term: 

Divide each side by '0.00008'.
549300 + -2487.5x + x2 = 0

Move the constant term to the right:

Add '-549300' to each side of the equation.
549300 + -2487.5x + -549300 + x2 = 0 + -549300

Reorder the terms:
549300 + -549300 + -2487.5x + x2 = 0 + -549300

Combine like terms: 549300 + -549300 = 0
0 + -2487.5x + x2 = 0 + -549300
-2487.5x + x2 = 0 + -549300

Combine like terms: 0 + -549300 = -549300
-2487.5x + x2 = -549300

The x term is -2487.5x.  Take half its coefficient (-1243.75).
Square it (1546914.063) and add it to both sides.

Add '1546914.063' to each side of the equation.
-2487.5x + 1546914.063 + x2 = -549300 + 1546914.063

Reorder the terms:
1546914.063 + -2487.5x + x2 = -549300 + 1546914.063

Combine like terms: -549300 + 1546914.063 = 997614.063
1546914.063 + -2487.5x + x2 = 997614.063

Factor a perfect square on the left side:
(x + -1243.75)(x + -1243.75) = 997614.063

Calculate the square root of the right side: 998.806319063

Break this problem into two subproblems by setting 
(x + -1243.75) equal to 998.806319063 and -998.806319063.

Subproblem 1

x + -1243.75 = 998.806319063 Simplifying x + -1243.75 = 998.806319063 Reorder the terms: -1243.75 + x = 998.806319063 Solving -1243.75 + x = 998.806319063 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1243.75' to each side of the equation. -1243.75 + 1243.75 + x = 998.806319063 + 1243.75 Combine like terms: -1243.75 + 1243.75 = 0.00 0.00 + x = 998.806319063 + 1243.75 x = 998.806319063 + 1243.75 Combine like terms: 998.806319063 + 1243.75 = 2242.556319063 x = 2242.556319063 Simplifying x = 2242.556319063

Subproblem 2

x + -1243.75 = -998.806319063 Simplifying x + -1243.75 = -998.806319063 Reorder the terms: -1243.75 + x = -998.806319063 Solving -1243.75 + x = -998.806319063 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1243.75' to each side of the equation. -1243.75 + 1243.75 + x = -998.806319063 + 1243.75 Combine like terms: -1243.75 + 1243.75 = 0.00 0.00 + x = -998.806319063 + 1243.75 x = -998.806319063 + 1243.75 Combine like terms: -998.806319063 + 1243.75 = 244.943680937 x = 244.943680937 Simplifying x = 244.943680937

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2242.556319063, 244.943680937}

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