-x^2-.000018x+.0000045=0

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Solution for -x^2-.000018x+.0000045=0 equation:


Simplifying
-1x2 + -0.000018x + 0.0000045 = 0

Reorder the terms:
0.0000045 + -0.000018x + -1x2 = 0

Solving
0.0000045 + -0.000018x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-0.0000045 + 0.000018x + x2 = 0

Move the constant term to the right:

Add '0.0000045' to each side of the equation.
-0.0000045 + 0.000018x + 0.0000045 + x2 = 0 + 0.0000045

Reorder the terms:
-0.0000045 + 0.0000045 + 0.000018x + x2 = 0 + 0.0000045

Combine like terms: -0.0000045 + 0.0000045 = 0.0000000
0.0000000 + 0.000018x + x2 = 0 + 0.0000045
0.000018x + x2 = 0 + 0.0000045

Combine like terms: 0 + 0.0000045 = 0.0000045
0.000018x + x2 = 0.0000045

The x term is 0.000018x.  Take half its coefficient (0.000009).
Square it (0.000000000081) and add it to both sides.

Add '0.000000000081' to each side of the equation.
0.000018x + 0.000000000081 + x2 = 0.0000045 + 0.000000000081

Reorder the terms:
0.000000000081 + 0.000018x + x2 = 0.0000045 + 0.000000000081

Combine like terms: 0.0000045 + 0.000000000081 = 0.000004500081
0.000000000081 + 0.000018x + x2 = 0.000004500081

Factor a perfect square on the left side:
(x + 0.000009)(x + 0.000009) = 0.000004500081

Calculate the square root of the right side: 0.002121339

Break this problem into two subproblems by setting 
(x + 0.000009) equal to 0.002121339 and -0.002121339.

Subproblem 1

x + 0.000009 = 0.002121339 Simplifying x + 0.000009 = 0.002121339 Reorder the terms: 0.000009 + x = 0.002121339 Solving 0.000009 + x = 0.002121339 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.000009' to each side of the equation. 0.000009 + -0.000009 + x = 0.002121339 + -0.000009 Combine like terms: 0.000009 + -0.000009 = 0.000000 0.000000 + x = 0.002121339 + -0.000009 x = 0.002121339 + -0.000009 Combine like terms: 0.002121339 + -0.000009 = 0.002112339 x = 0.002112339 Simplifying x = 0.002112339

Subproblem 2

x + 0.000009 = -0.002121339 Simplifying x + 0.000009 = -0.002121339 Reorder the terms: 0.000009 + x = -0.002121339 Solving 0.000009 + x = -0.002121339 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.000009' to each side of the equation. 0.000009 + -0.000009 + x = -0.002121339 + -0.000009 Combine like terms: 0.000009 + -0.000009 = 0.000000 0.000000 + x = -0.002121339 + -0.000009 x = -0.002121339 + -0.000009 Combine like terms: -0.002121339 + -0.000009 = -0.002130339 x = -0.002130339 Simplifying x = -0.002130339

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.002112339, -0.002130339}

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