(3x+1)(x+-1)=3.4

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Solution for (3x+1)(x+-1)=3.4 equation:


Simplifying
(3x + 1)(x + -1) = 3.4

Reorder the terms:
(1 + 3x)(x + -1) = 3.4

Reorder the terms:
(1 + 3x)(-1 + x) = 3.4

Multiply (1 + 3x) * (-1 + x)
(1(-1 + x) + 3x * (-1 + x)) = 3.4
((-1 * 1 + x * 1) + 3x * (-1 + x)) = 3.4
((-1 + 1x) + 3x * (-1 + x)) = 3.4
(-1 + 1x + (-1 * 3x + x * 3x)) = 3.4
(-1 + 1x + (-3x + 3x2)) = 3.4

Combine like terms: 1x + -3x = -2x
(-1 + -2x + 3x2) = 3.4

Solving
-1 + -2x + 3x2 = 3.4

Solving for variable 'x'.

Reorder the terms:
-1 + -3.4 + -2x + 3x2 = 3.4 + -3.4

Combine like terms: -1 + -3.4 = -4.4
-4.4 + -2x + 3x2 = 3.4 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
-4.4 + -2x + 3x2 = 0.0

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

Divide each side by '3'.
-1.466666667 + -0.6666666667x + x2 = 0.0

Move the constant term to the right:

Add '1.466666667' to each side of the equation.
-1.466666667 + -0.6666666667x + 1.466666667 + x2 = 0.0 + 1.466666667

Reorder the terms:
-1.466666667 + 1.466666667 + -0.6666666667x + x2 = 0.0 + 1.466666667

Combine like terms: -1.466666667 + 1.466666667 = 0.000000000
0.000000000 + -0.6666666667x + x2 = 0.0 + 1.466666667
-0.6666666667x + x2 = 0.0 + 1.466666667

Combine like terms: 0.0 + 1.466666667 = 1.466666667
-0.6666666667x + x2 = 1.466666667

The x term is -0.6666666667x.  Take half its coefficient (-0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
-0.6666666667x + 0.1111111112 + x2 = 1.466666667 + 0.1111111112

Reorder the terms:
0.1111111112 + -0.6666666667x + x2 = 1.466666667 + 0.1111111112

Combine like terms: 1.466666667 + 0.1111111112 = 1.5777777782
0.1111111112 + -0.6666666667x + x2 = 1.5777777782

Factor a perfect square on the left side:
(x + -0.3333333334)(x + -0.3333333334) = 1.5777777782

Calculate the square root of the right side: 1.256096246

Break this problem into two subproblems by setting 
(x + -0.3333333334) equal to 1.256096246 and -1.256096246.

Subproblem 1

x + -0.3333333334 = 1.256096246 Simplifying x + -0.3333333334 = 1.256096246 Reorder the terms: -0.3333333334 + x = 1.256096246 Solving -0.3333333334 + x = 1.256096246 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = 1.256096246 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = 1.256096246 + 0.3333333334 x = 1.256096246 + 0.3333333334 Combine like terms: 1.256096246 + 0.3333333334 = 1.5894295794 x = 1.5894295794 Simplifying x = 1.5894295794

Subproblem 2

x + -0.3333333334 = -1.256096246 Simplifying x + -0.3333333334 = -1.256096246 Reorder the terms: -0.3333333334 + x = -1.256096246 Solving -0.3333333334 + x = -1.256096246 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + x = -1.256096246 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + x = -1.256096246 + 0.3333333334 x = -1.256096246 + 0.3333333334 Combine like terms: -1.256096246 + 0.3333333334 = -0.9227629126 x = -0.9227629126 Simplifying x = -0.9227629126

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5894295794, -0.9227629126}

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