38.1x^2+2.72x-0.065=0

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Solution for 38.1x^2+2.72x-0.065=0 equation:


Simplifying
38.1x2 + 2.72x + -0.065 = 0

Reorder the terms:
-0.065 + 2.72x + 38.1x2 = 0

Solving
-0.065 + 2.72x + 38.1x2 = 0

Solving for variable 'x'.

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

Divide each side by '38.1'.
-0.001706036745 + 0.07139107612x + x2 = 0

Move the constant term to the right:

Add '0.001706036745' to each side of the equation.
-0.001706036745 + 0.07139107612x + 0.001706036745 + x2 = 0 + 0.001706036745

Reorder the terms:
-0.001706036745 + 0.001706036745 + 0.07139107612x + x2 = 0 + 0.001706036745

Combine like terms: -0.001706036745 + 0.001706036745 = 0.000000000000
0.000000000000 + 0.07139107612x + x2 = 0 + 0.001706036745
0.07139107612x + x2 = 0 + 0.001706036745

Combine like terms: 0 + 0.001706036745 = 0.001706036745
0.07139107612x + x2 = 0.001706036745

The x term is 0.07139107612x.  Take half its coefficient (0.03569553806).
Square it (0.001274171437) and add it to both sides.

Add '0.001274171437' to each side of the equation.
0.07139107612x + 0.001274171437 + x2 = 0.001706036745 + 0.001274171437

Reorder the terms:
0.001274171437 + 0.07139107612x + x2 = 0.001706036745 + 0.001274171437

Combine like terms: 0.001706036745 + 0.001274171437 = 0.002980208182
0.001274171437 + 0.07139107612x + x2 = 0.002980208182

Factor a perfect square on the left side:
(x + 0.03569553806)(x + 0.03569553806) = 0.002980208182

Calculate the square root of the right side: 0.054591283

Break this problem into two subproblems by setting 
(x + 0.03569553806) equal to 0.054591283 and -0.054591283.

Subproblem 1

x + 0.03569553806 = 0.054591283 Simplifying x + 0.03569553806 = 0.054591283 Reorder the terms: 0.03569553806 + x = 0.054591283 Solving 0.03569553806 + x = 0.054591283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03569553806' to each side of the equation. 0.03569553806 + -0.03569553806 + x = 0.054591283 + -0.03569553806 Combine like terms: 0.03569553806 + -0.03569553806 = 0.00000000000 0.00000000000 + x = 0.054591283 + -0.03569553806 x = 0.054591283 + -0.03569553806 Combine like terms: 0.054591283 + -0.03569553806 = 0.01889574494 x = 0.01889574494 Simplifying x = 0.01889574494

Subproblem 2

x + 0.03569553806 = -0.054591283 Simplifying x + 0.03569553806 = -0.054591283 Reorder the terms: 0.03569553806 + x = -0.054591283 Solving 0.03569553806 + x = -0.054591283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.03569553806' to each side of the equation. 0.03569553806 + -0.03569553806 + x = -0.054591283 + -0.03569553806 Combine like terms: 0.03569553806 + -0.03569553806 = 0.00000000000 0.00000000000 + x = -0.054591283 + -0.03569553806 x = -0.054591283 + -0.03569553806 Combine like terms: -0.054591283 + -0.03569553806 = -0.09028682106 x = -0.09028682106 Simplifying x = -0.09028682106

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.01889574494, -0.09028682106}

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