x^2+1.8*0.001x-1.8*0.0001=0

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Solution for x^2+1.8*0.001x-1.8*0.0001=0 equation:


Simplifying
x2 + 1.8 * 0.001x + -1.8 * 0.0001 = 0

Multiply 1.8 * 0.001
x2 + 0.0018x + -1.8 * 0.0001 = 0

Multiply -1.8 * 0.0001
x2 + 0.0018x + -0.00018 = 0

Reorder the terms:
-0.00018 + 0.0018x + x2 = 0

Solving
-0.00018 + 0.0018x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.00018' to each side of the equation.
-0.00018 + 0.0018x + 0.00018 + x2 = 0 + 0.00018

Reorder the terms:
-0.00018 + 0.00018 + 0.0018x + x2 = 0 + 0.00018

Combine like terms: -0.00018 + 0.00018 = 0.00000
0.00000 + 0.0018x + x2 = 0 + 0.00018
0.0018x + x2 = 0 + 0.00018

Combine like terms: 0 + 0.00018 = 0.00018
0.0018x + x2 = 0.00018

The x term is 0.0018x.  Take half its coefficient (0.0009).
Square it (0.00000081) and add it to both sides.

Add '0.00000081' to each side of the equation.
0.0018x + 0.00000081 + x2 = 0.00018 + 0.00000081

Reorder the terms:
0.00000081 + 0.0018x + x2 = 0.00018 + 0.00000081

Combine like terms: 0.00018 + 0.00000081 = 0.00018081
0.00000081 + 0.0018x + x2 = 0.00018081

Factor a perfect square on the left side:
(x + 0.0009)(x + 0.0009) = 0.00018081

Calculate the square root of the right side: 0.013446561

Break this problem into two subproblems by setting 
(x + 0.0009) equal to 0.013446561 and -0.013446561.

Subproblem 1

x + 0.0009 = 0.013446561 Simplifying x + 0.0009 = 0.013446561 Reorder the terms: 0.0009 + x = 0.013446561 Solving 0.0009 + x = 0.013446561 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0009' to each side of the equation. 0.0009 + -0.0009 + x = 0.013446561 + -0.0009 Combine like terms: 0.0009 + -0.0009 = 0.0000 0.0000 + x = 0.013446561 + -0.0009 x = 0.013446561 + -0.0009 Combine like terms: 0.013446561 + -0.0009 = 0.012546561 x = 0.012546561 Simplifying x = 0.012546561

Subproblem 2

x + 0.0009 = -0.013446561 Simplifying x + 0.0009 = -0.013446561 Reorder the terms: 0.0009 + x = -0.013446561 Solving 0.0009 + x = -0.013446561 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0009' to each side of the equation. 0.0009 + -0.0009 + x = -0.013446561 + -0.0009 Combine like terms: 0.0009 + -0.0009 = 0.0000 0.0000 + x = -0.013446561 + -0.0009 x = -0.013446561 + -0.0009 Combine like terms: -0.013446561 + -0.0009 = -0.014346561 x = -0.014346561 Simplifying x = -0.014346561

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.012546561, -0.014346561}

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