0.3x^2-x+0.6=0

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Solution for 0.3x^2-x+0.6=0 equation:


Simplifying
0.3x2 + -1x + 0.6 = 0

Reorder the terms:
0.6 + -1x + 0.3x2 = 0

Solving
0.6 + -1x + 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'.
2 + -3.333333333x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -3.333333333x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -3.333333333x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -3.333333333x + x2 = 0 + -2
-3.333333333x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-3.333333333x + x2 = -2

The x term is -3.333333333x.  Take half its coefficient (-1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
-3.333333333x + 2.777777779 + x2 = -2 + 2.777777779

Reorder the terms:
2.777777779 + -3.333333333x + x2 = -2 + 2.777777779

Combine like terms: -2 + 2.777777779 = 0.777777779
2.777777779 + -3.333333333x + x2 = 0.777777779

Factor a perfect square on the left side:
(x + -1.666666667)(x + -1.666666667) = 0.777777779

Calculate the square root of the right side: 0.881917104

Break this problem into two subproblems by setting 
(x + -1.666666667) equal to 0.881917104 and -0.881917104.

Subproblem 1

x + -1.666666667 = 0.881917104 Simplifying x + -1.666666667 = 0.881917104 Reorder the terms: -1.666666667 + x = 0.881917104 Solving -1.666666667 + x = 0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + x = 0.881917104 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + x = 0.881917104 + 1.666666667 x = 0.881917104 + 1.666666667 Combine like terms: 0.881917104 + 1.666666667 = 2.548583771 x = 2.548583771 Simplifying x = 2.548583771

Subproblem 2

x + -1.666666667 = -0.881917104 Simplifying x + -1.666666667 = -0.881917104 Reorder the terms: -1.666666667 + x = -0.881917104 Solving -1.666666667 + x = -0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + x = -0.881917104 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + x = -0.881917104 + 1.666666667 x = -0.881917104 + 1.666666667 Combine like terms: -0.881917104 + 1.666666667 = 0.784749563 x = 0.784749563 Simplifying x = 0.784749563

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.548583771, 0.784749563}

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