0=x^2+0.036x-0.00693

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Solution for 0=x^2+0.036x-0.00693 equation:


Simplifying
0 = x2 + 0.036x + -0.00693

Reorder the terms:
0 = -0.00693 + 0.036x + x2

Solving
0 = -0.00693 + 0.036x + x2

Solving for variable 'x'.

Combine like terms: 0 + 0.00693 = 0.00693
0.00693 + -0.036x + -1x2 = -0.00693 + 0.036x + x2 + 0.00693 + -0.036x + -1x2

Reorder the terms:
0.00693 + -0.036x + -1x2 = -0.00693 + 0.00693 + 0.036x + -0.036x + x2 + -1x2

Combine like terms: -0.00693 + 0.00693 = 0.00000
0.00693 + -0.036x + -1x2 = 0.00000 + 0.036x + -0.036x + x2 + -1x2
0.00693 + -0.036x + -1x2 = 0.036x + -0.036x + x2 + -1x2

Combine like terms: 0.036x + -0.036x = 0.000
0.00693 + -0.036x + -1x2 = 0.000 + x2 + -1x2
0.00693 + -0.036x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
0.00693 + -0.036x + -1x2 = 0

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

Divide each side by '-1'.
-0.00693 + 0.036x + x2 = 0

Move the constant term to the right:

Add '0.00693' to each side of the equation.
-0.00693 + 0.036x + 0.00693 + x2 = 0 + 0.00693

Reorder the terms:
-0.00693 + 0.00693 + 0.036x + x2 = 0 + 0.00693

Combine like terms: -0.00693 + 0.00693 = 0.00000
0.00000 + 0.036x + x2 = 0 + 0.00693
0.036x + x2 = 0 + 0.00693

Combine like terms: 0 + 0.00693 = 0.00693
0.036x + x2 = 0.00693

The x term is 0.036x.  Take half its coefficient (0.018).
Square it (0.000324) and add it to both sides.

Add '0.000324' to each side of the equation.
0.036x + 0.000324 + x2 = 0.00693 + 0.000324

Reorder the terms:
0.000324 + 0.036x + x2 = 0.00693 + 0.000324

Combine like terms: 0.00693 + 0.000324 = 0.007254
0.000324 + 0.036x + x2 = 0.007254

Factor a perfect square on the left side:
(x + 0.018)(x + 0.018) = 0.007254

Calculate the square root of the right side: 0.085170417

Break this problem into two subproblems by setting 
(x + 0.018) equal to 0.085170417 and -0.085170417.

Subproblem 1

x + 0.018 = 0.085170417 Simplifying x + 0.018 = 0.085170417 Reorder the terms: 0.018 + x = 0.085170417 Solving 0.018 + x = 0.085170417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.018' to each side of the equation. 0.018 + -0.018 + x = 0.085170417 + -0.018 Combine like terms: 0.018 + -0.018 = 0.000 0.000 + x = 0.085170417 + -0.018 x = 0.085170417 + -0.018 Combine like terms: 0.085170417 + -0.018 = 0.067170417 x = 0.067170417 Simplifying x = 0.067170417

Subproblem 2

x + 0.018 = -0.085170417 Simplifying x + 0.018 = -0.085170417 Reorder the terms: 0.018 + x = -0.085170417 Solving 0.018 + x = -0.085170417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.018' to each side of the equation. 0.018 + -0.018 + x = -0.085170417 + -0.018 Combine like terms: 0.018 + -0.018 = 0.000 0.000 + x = -0.085170417 + -0.018 x = -0.085170417 + -0.018 Combine like terms: -0.085170417 + -0.018 = -0.103170417 x = -0.103170417 Simplifying x = -0.103170417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.067170417, -0.103170417}

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