.19x=2.5+.15x-.0001x^2

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Solution for .19x=2.5+.15x-.0001x^2 equation:


Simplifying
0.19x = 2.5 + 0.15x + -0.0001x2

Solving
0.19x = 2.5 + 0.15x + -0.0001x2

Solving for variable 'x'.

Reorder the terms:
-2.5 + 0.19x + -0.15x + 0.0001x2 = 2.5 + 0.15x + -0.0001x2 + -2.5 + -0.15x + 0.0001x2

Combine like terms: 0.19x + -0.15x = 0.04x
-2.5 + 0.04x + 0.0001x2 = 2.5 + 0.15x + -0.0001x2 + -2.5 + -0.15x + 0.0001x2

Reorder the terms:
-2.5 + 0.04x + 0.0001x2 = 2.5 + -2.5 + 0.15x + -0.15x + -0.0001x2 + 0.0001x2

Combine like terms: 2.5 + -2.5 = 0.0
-2.5 + 0.04x + 0.0001x2 = 0.0 + 0.15x + -0.15x + -0.0001x2 + 0.0001x2
-2.5 + 0.04x + 0.0001x2 = 0.15x + -0.15x + -0.0001x2 + 0.0001x2

Combine like terms: 0.15x + -0.15x = 0.00
-2.5 + 0.04x + 0.0001x2 = 0.00 + -0.0001x2 + 0.0001x2
-2.5 + 0.04x + 0.0001x2 = -0.0001x2 + 0.0001x2

Combine like terms: -0.0001x2 + 0.0001x2 = 0.0000
-2.5 + 0.04x + 0.0001x2 = 0.0000

Begin completing the square.  Divide all terms by
0.0001 the coefficient of the squared term: 

Divide each side by '0.0001'.
-25000 + 400x + x2 = 0

Move the constant term to the right:

Add '25000' to each side of the equation.
-25000 + 400x + 25000 + x2 = 0 + 25000

Reorder the terms:
-25000 + 25000 + 400x + x2 = 0 + 25000

Combine like terms: -25000 + 25000 = 0
0 + 400x + x2 = 0 + 25000
400x + x2 = 0 + 25000

Combine like terms: 0 + 25000 = 25000
400x + x2 = 25000

The x term is 400x.  Take half its coefficient (200).
Square it (40000) and add it to both sides.

Add '40000' to each side of the equation.
400x + 40000 + x2 = 25000 + 40000

Reorder the terms:
40000 + 400x + x2 = 25000 + 40000

Combine like terms: 25000 + 40000 = 65000
40000 + 400x + x2 = 65000

Factor a perfect square on the left side:
(x + 200)(x + 200) = 65000

Calculate the square root of the right side: 254.95097568

Break this problem into two subproblems by setting 
(x + 200) equal to 254.95097568 and -254.95097568.

Subproblem 1

x + 200 = 254.95097568 Simplifying x + 200 = 254.95097568 Reorder the terms: 200 + x = 254.95097568 Solving 200 + x = 254.95097568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + x = 254.95097568 + -200 Combine like terms: 200 + -200 = 0 0 + x = 254.95097568 + -200 x = 254.95097568 + -200 Combine like terms: 254.95097568 + -200 = 54.95097568 x = 54.95097568 Simplifying x = 54.95097568

Subproblem 2

x + 200 = -254.95097568 Simplifying x + 200 = -254.95097568 Reorder the terms: 200 + x = -254.95097568 Solving 200 + x = -254.95097568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + x = -254.95097568 + -200 Combine like terms: 200 + -200 = 0 0 + x = -254.95097568 + -200 x = -254.95097568 + -200 Combine like terms: -254.95097568 + -200 = -454.95097568 x = -454.95097568 Simplifying x = -454.95097568

Solution

The solution to the problem is based on the solutions from the subproblems. x = {54.95097568, -454.95097568}

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