0=.17x-(1.9+.15x-.0001x^2)

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Solution for 0=.17x-(1.9+.15x-.0001x^2) equation:


Simplifying
0 = 0.17x + -1(1.9 + 0.15x + -0.0001x2)
0 = 0.17x + (1.9 * -1 + 0.15x * -1 + -0.0001x2 * -1)
0 = 0.17x + (-1.9 + -0.15x + 0.0001x2)

Reorder the terms:
0 = -1.9 + 0.17x + -0.15x + 0.0001x2

Combine like terms: 0.17x + -0.15x = 0.02x
0 = -1.9 + 0.02x + 0.0001x2

Solving
0 = -1.9 + 0.02x + 0.0001x2

Solving for variable 'x'.

Combine like terms: 0 + 1.9 = 1.9
1.9 + -0.02x + -0.0001x2 = -1.9 + 0.02x + 0.0001x2 + 1.9 + -0.02x + -0.0001x2

Reorder the terms:
1.9 + -0.02x + -0.0001x2 = -1.9 + 1.9 + 0.02x + -0.02x + 0.0001x2 + -0.0001x2

Combine like terms: -1.9 + 1.9 = 0.0
1.9 + -0.02x + -0.0001x2 = 0.0 + 0.02x + -0.02x + 0.0001x2 + -0.0001x2
1.9 + -0.02x + -0.0001x2 = 0.02x + -0.02x + 0.0001x2 + -0.0001x2

Combine like terms: 0.02x + -0.02x = 0.00
1.9 + -0.02x + -0.0001x2 = 0.00 + 0.0001x2 + -0.0001x2
1.9 + -0.02x + -0.0001x2 = 0.0001x2 + -0.0001x2

Combine like terms: 0.0001x2 + -0.0001x2 = 0.0000
1.9 + -0.02x + -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'.
-19000 + 200x + x2 = 0

Move the constant term to the right:

Add '19000' to each side of the equation.
-19000 + 200x + 19000 + x2 = 0 + 19000

Reorder the terms:
-19000 + 19000 + 200x + x2 = 0 + 19000

Combine like terms: -19000 + 19000 = 0
0 + 200x + x2 = 0 + 19000
200x + x2 = 0 + 19000

Combine like terms: 0 + 19000 = 19000
200x + x2 = 19000

The x term is 200x.  Take half its coefficient (100).
Square it (10000) and add it to both sides.

Add '10000' to each side of the equation.
200x + 10000 + x2 = 19000 + 10000

Reorder the terms:
10000 + 200x + x2 = 19000 + 10000

Combine like terms: 19000 + 10000 = 29000
10000 + 200x + x2 = 29000

Factor a perfect square on the left side:
(x + 100)(x + 100) = 29000

Calculate the square root of the right side: 170.293863659

Break this problem into two subproblems by setting 
(x + 100) equal to 170.293863659 and -170.293863659.

Subproblem 1

x + 100 = 170.293863659 Simplifying x + 100 = 170.293863659 Reorder the terms: 100 + x = 170.293863659 Solving 100 + x = 170.293863659 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = 170.293863659 + -100 Combine like terms: 100 + -100 = 0 0 + x = 170.293863659 + -100 x = 170.293863659 + -100 Combine like terms: 170.293863659 + -100 = 70.293863659 x = 70.293863659 Simplifying x = 70.293863659

Subproblem 2

x + 100 = -170.293863659 Simplifying x + 100 = -170.293863659 Reorder the terms: 100 + x = -170.293863659 Solving 100 + x = -170.293863659 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100' to each side of the equation. 100 + -100 + x = -170.293863659 + -100 Combine like terms: 100 + -100 = 0 0 + x = -170.293863659 + -100 x = -170.293863659 + -100 Combine like terms: -170.293863659 + -100 = -270.293863659 x = -270.293863659 Simplifying x = -270.293863659

Solution

The solution to the problem is based on the solutions from the subproblems. x = {70.293863659, -270.293863659}

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