x^2+.12x-.054=0

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Solution for x^2+.12x-.054=0 equation:


Simplifying
x2 + 0.12x + -0.054 = 0

Reorder the terms:
-0.054 + 0.12x + x2 = 0

Solving
-0.054 + 0.12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.054' to each side of the equation.
-0.054 + 0.12x + 0.054 + x2 = 0 + 0.054

Reorder the terms:
-0.054 + 0.054 + 0.12x + x2 = 0 + 0.054

Combine like terms: -0.054 + 0.054 = 0.000
0.000 + 0.12x + x2 = 0 + 0.054
0.12x + x2 = 0 + 0.054

Combine like terms: 0 + 0.054 = 0.054
0.12x + x2 = 0.054

The x term is 0.12x.  Take half its coefficient (0.06).
Square it (0.0036) and add it to both sides.

Add '0.0036' to each side of the equation.
0.12x + 0.0036 + x2 = 0.054 + 0.0036

Reorder the terms:
0.0036 + 0.12x + x2 = 0.054 + 0.0036

Combine like terms: 0.054 + 0.0036 = 0.0576
0.0036 + 0.12x + x2 = 0.0576

Factor a perfect square on the left side:
(x + 0.06)(x + 0.06) = 0.0576

Calculate the square root of the right side: 0.24

Break this problem into two subproblems by setting 
(x + 0.06) equal to 0.24 and -0.24.

Subproblem 1

x + 0.06 = 0.24 Simplifying x + 0.06 = 0.24 Reorder the terms: 0.06 + x = 0.24 Solving 0.06 + x = 0.24 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06' to each side of the equation. 0.06 + -0.06 + x = 0.24 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = 0.24 + -0.06 x = 0.24 + -0.06 Combine like terms: 0.24 + -0.06 = 0.18 x = 0.18 Simplifying x = 0.18

Subproblem 2

x + 0.06 = -0.24 Simplifying x + 0.06 = -0.24 Reorder the terms: 0.06 + x = -0.24 Solving 0.06 + x = -0.24 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.06' to each side of the equation. 0.06 + -0.06 + x = -0.24 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = -0.24 + -0.06 x = -0.24 + -0.06 Combine like terms: -0.24 + -0.06 = -0.3 x = -0.3 Simplifying x = -0.3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.18, -0.3}

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