0.5(3x-2)(4x+1)=0

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Solution for 0.5(3x-2)(4x+1)=0 equation:


Simplifying
0.5(3x + -2)(4x + 1) = 0

Reorder the terms:
0.5(-2 + 3x)(4x + 1) = 0

Reorder the terms:
0.5(-2 + 3x)(1 + 4x) = 0

Multiply (-2 + 3x) * (1 + 4x)
0.5(-2(1 + 4x) + 3x * (1 + 4x)) = 0
0.5((1 * -2 + 4x * -2) + 3x * (1 + 4x)) = 0
0.5((-2 + -8x) + 3x * (1 + 4x)) = 0
0.5(-2 + -8x + (1 * 3x + 4x * 3x)) = 0
0.5(-2 + -8x + (3x + 12x2)) = 0

Combine like terms: -8x + 3x = -5x
0.5(-2 + -5x + 12x2) = 0
(-2 * 0.5 + -5x * 0.5 + 12x2 * 0.5) = 0
(-1 + -2.5x + 6x2) = 0

Solving
-1 + -2.5x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-0.1666666667 + -0.4166666667x + x2 = 0

Move the constant term to the right:

Add '0.1666666667' to each side of the equation.
-0.1666666667 + -0.4166666667x + 0.1666666667 + x2 = 0 + 0.1666666667

Reorder the terms:
-0.1666666667 + 0.1666666667 + -0.4166666667x + x2 = 0 + 0.1666666667

Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000
0.0000000000 + -0.4166666667x + x2 = 0 + 0.1666666667
-0.4166666667x + x2 = 0 + 0.1666666667

Combine like terms: 0 + 0.1666666667 = 0.1666666667
-0.4166666667x + x2 = 0.1666666667

The x term is -0.4166666667x.  Take half its coefficient (-0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
-0.4166666667x + 0.04340277781 + x2 = 0.1666666667 + 0.04340277781

Reorder the terms:
0.04340277781 + -0.4166666667x + x2 = 0.1666666667 + 0.04340277781

Combine like terms: 0.1666666667 + 0.04340277781 = 0.21006944451
0.04340277781 + -0.4166666667x + x2 = 0.21006944451

Factor a perfect square on the left side:
(x + -0.2083333334)(x + -0.2083333334) = 0.21006944451

Calculate the square root of the right side: 0.458333333

Break this problem into two subproblems by setting 
(x + -0.2083333334) equal to 0.458333333 and -0.458333333.

Subproblem 1

x + -0.2083333334 = 0.458333333 Simplifying x + -0.2083333334 = 0.458333333 Reorder the terms: -0.2083333334 + x = 0.458333333 Solving -0.2083333334 + x = 0.458333333 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + x = 0.458333333 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + x = 0.458333333 + 0.2083333334 x = 0.458333333 + 0.2083333334 Combine like terms: 0.458333333 + 0.2083333334 = 0.6666666664 x = 0.6666666664 Simplifying x = 0.6666666664

Subproblem 2

x + -0.2083333334 = -0.458333333 Simplifying x + -0.2083333334 = -0.458333333 Reorder the terms: -0.2083333334 + x = -0.458333333 Solving -0.2083333334 + x = -0.458333333 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + x = -0.458333333 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + x = -0.458333333 + 0.2083333334 x = -0.458333333 + 0.2083333334 Combine like terms: -0.458333333 + 0.2083333334 = -0.2499999996 x = -0.2499999996 Simplifying x = -0.2499999996

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6666666664, -0.2499999996}

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