-0.3x^2-0.7x+1.2=

Solution for -0.3x^2-0.7x+1.2= equation:

Simplifying
-0.3x2 + -0.7x + 1.2 = 0

Reorder the terms:
1.2 + -0.7x + -0.3x2 = 0

Solving
1.2 + -0.7x + -0.3x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.3 the coefficient of the squared term: 

Divide each side by '-0.3'.
-4 + 2.333333333x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 2.333333333x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 2.333333333x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 2.333333333x + x2 = 0 + 4
2.333333333x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
2.333333333x + x2 = 4

The x term is 2.333333333x.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x + 1.361111112 + x2 = 4 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x + x2 = 4 + 1.361111112

Combine like terms: 4 + 1.361111112 = 5.361111112
1.361111112 + 2.333333333x + x2 = 5.361111112

Factor a perfect square on the left side:
(x + 1.166666667)(x + 1.166666667) = 5.361111112

Calculate the square root of the right side: 2.315407332

Break this problem into two subproblems by setting 
(x + 1.166666667) equal to 2.315407332 and -2.315407332.

Subproblem 1
x + 1.166666667 = 2.315407332

Simplifying
x + 1.166666667 = 2.315407332

Reorder the terms:
1.166666667 + x = 2.315407332

Solving
1.166666667 + x = 2.315407332

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1.166666667' to each side of the equation.
1.166666667 + -1.166666667 + x = 2.315407332 + -1.166666667

Combine like terms: 1.166666667 + -1.166666667 = 0.000000000
0.000000000 + x = 2.315407332 + -1.166666667
x = 2.315407332 + -1.166666667

Combine like terms: 2.315407332 + -1.166666667 = 1.148740665
x = 1.148740665

Simplifying
x = 1.148740665

Subproblem 2
x + 1.166666667 = -2.315407332

Simplifying
x + 1.166666667 = -2.315407332

Reorder the terms:
1.166666667 + x = -2.315407332

Solving
1.166666667 + x = -2.315407332

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1.166666667' to each side of the equation.
1.166666667 + -1.166666667 + x = -2.315407332 + -1.166666667

Combine like terms: 1.166666667 + -1.166666667 = 0.000000000
0.000000000 + x = -2.315407332 + -1.166666667
x = -2.315407332 + -1.166666667

Combine like terms: -2.315407332 + -1.166666667 = -3.482073999
x = -3.482073999

Simplifying
x = -3.482073999

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {1.148740665, -3.482073999}