2x^2-4.6x+1.2=0

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Solution for 2x^2-4.6x+1.2=0 equation:


Simplifying
2x2 + -4.6x + 1.2 = 0

Reorder the terms:
1.2 + -4.6x + 2x2 = 0

Solving
1.2 + -4.6x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
0.6 + -2.3x + x2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + -2.3x + -0.6 + x2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + -2.3x + x2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + -2.3x + x2 = 0 + -0.6
-2.3x + x2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
-2.3x + x2 = -0.6

The x term is -2.3x.  Take half its coefficient (-1.15).
Square it (1.3225) and add it to both sides.

Add '1.3225' to each side of the equation.
-2.3x + 1.3225 + x2 = -0.6 + 1.3225

Reorder the terms:
1.3225 + -2.3x + x2 = -0.6 + 1.3225

Combine like terms: -0.6 + 1.3225 = 0.7225
1.3225 + -2.3x + x2 = 0.7225

Factor a perfect square on the left side:
(x + -1.15)(x + -1.15) = 0.7225

Calculate the square root of the right side: 0.85

Break this problem into two subproblems by setting 
(x + -1.15) equal to 0.85 and -0.85.

Subproblem 1

x + -1.15 = 0.85 Simplifying x + -1.15 = 0.85 Reorder the terms: -1.15 + x = 0.85 Solving -1.15 + x = 0.85 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.15' to each side of the equation. -1.15 + 1.15 + x = 0.85 + 1.15 Combine like terms: -1.15 + 1.15 = 0.00 0.00 + x = 0.85 + 1.15 x = 0.85 + 1.15 Combine like terms: 0.85 + 1.15 = 2 x = 2 Simplifying x = 2

Subproblem 2

x + -1.15 = -0.85 Simplifying x + -1.15 = -0.85 Reorder the terms: -1.15 + x = -0.85 Solving -1.15 + x = -0.85 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.15' to each side of the equation. -1.15 + 1.15 + x = -0.85 + 1.15 Combine like terms: -1.15 + 1.15 = 0.00 0.00 + x = -0.85 + 1.15 x = -0.85 + 1.15 Combine like terms: -0.85 + 1.15 = 0.3 x = 0.3 Simplifying x = 0.3

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2, 0.3}

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