3x^2-3.2x-2.4=0

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Solution for 3x^2-3.2x-2.4=0 equation:


Simplifying
3x2 + -3.2x + -2.4 = 0

Reorder the terms:
-2.4 + -3.2x + 3x2 = 0

Solving
-2.4 + -3.2x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-0.8 + -1.066666667x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -1.066666667x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -1.066666667x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -1.066666667x + x2 = 0 + 0.8
-1.066666667x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-1.066666667x + x2 = 0.8

The x term is -1.066666667x.  Take half its coefficient (-0.5333333335).
Square it (0.2844444446) and add it to both sides.

Add '0.2844444446' to each side of the equation.
-1.066666667x + 0.2844444446 + x2 = 0.8 + 0.2844444446

Reorder the terms:
0.2844444446 + -1.066666667x + x2 = 0.8 + 0.2844444446

Combine like terms: 0.8 + 0.2844444446 = 1.0844444446
0.2844444446 + -1.066666667x + x2 = 1.0844444446

Factor a perfect square on the left side:
(x + -0.5333333335)(x + -0.5333333335) = 1.0844444446

Calculate the square root of the right side: 1.041366624

Break this problem into two subproblems by setting 
(x + -0.5333333335) equal to 1.041366624 and -1.041366624.

Subproblem 1

x + -0.5333333335 = 1.041366624 Simplifying x + -0.5333333335 = 1.041366624 Reorder the terms: -0.5333333335 + x = 1.041366624 Solving -0.5333333335 + x = 1.041366624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5333333335' to each side of the equation. -0.5333333335 + 0.5333333335 + x = 1.041366624 + 0.5333333335 Combine like terms: -0.5333333335 + 0.5333333335 = 0.0000000000 0.0000000000 + x = 1.041366624 + 0.5333333335 x = 1.041366624 + 0.5333333335 Combine like terms: 1.041366624 + 0.5333333335 = 1.5746999575 x = 1.5746999575 Simplifying x = 1.5746999575

Subproblem 2

x + -0.5333333335 = -1.041366624 Simplifying x + -0.5333333335 = -1.041366624 Reorder the terms: -0.5333333335 + x = -1.041366624 Solving -0.5333333335 + x = -1.041366624 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5333333335' to each side of the equation. -0.5333333335 + 0.5333333335 + x = -1.041366624 + 0.5333333335 Combine like terms: -0.5333333335 + 0.5333333335 = 0.0000000000 0.0000000000 + x = -1.041366624 + 0.5333333335 x = -1.041366624 + 0.5333333335 Combine like terms: -1.041366624 + 0.5333333335 = -0.5080332905 x = -0.5080332905 Simplifying x = -0.5080332905

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5746999575, -0.5080332905}

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