x^2+0.12x-1.2=0

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Solution for x^2+0.12x-1.2=0 equation:


Simplifying
x2 + 0.12x + -1.2 = 0

Reorder the terms:
-1.2 + 0.12x + x2 = 0

Solving
-1.2 + 0.12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + 0.12x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + 0.12x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.12x + x2 = 0 + 1.2
0.12x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
0.12x + x2 = 1.2

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 = 1.2 + 0.0036

Reorder the terms:
0.0036 + 0.12x + x2 = 1.2 + 0.0036

Combine like terms: 1.2 + 0.0036 = 1.2036
0.0036 + 0.12x + x2 = 1.2036

Factor a perfect square on the left side:
(x + 0.06)(x + 0.06) = 1.2036

Calculate the square root of the right side: 1.097087052

Break this problem into two subproblems by setting 
(x + 0.06) equal to 1.097087052 and -1.097087052.

Subproblem 1

x + 0.06 = 1.097087052 Simplifying x + 0.06 = 1.097087052 Reorder the terms: 0.06 + x = 1.097087052 Solving 0.06 + x = 1.097087052 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 = 1.097087052 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = 1.097087052 + -0.06 x = 1.097087052 + -0.06 Combine like terms: 1.097087052 + -0.06 = 1.037087052 x = 1.037087052 Simplifying x = 1.037087052

Subproblem 2

x + 0.06 = -1.097087052 Simplifying x + 0.06 = -1.097087052 Reorder the terms: 0.06 + x = -1.097087052 Solving 0.06 + x = -1.097087052 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 = -1.097087052 + -0.06 Combine like terms: 0.06 + -0.06 = 0.00 0.00 + x = -1.097087052 + -0.06 x = -1.097087052 + -0.06 Combine like terms: -1.097087052 + -0.06 = -1.157087052 x = -1.157087052 Simplifying x = -1.157087052

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.037087052, -1.157087052}

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