3x(2x-1)=4

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


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

Reorder the terms:
3x(-1 + 2x) = 4
(-1 * 3x + 2x * 3x) = 4
(-3x + 6x2) = 4

Solving
-3x + 6x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + -3x + 6x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -3x + 6x2 = 0

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

Divide each side by '6'.
-0.6666666667 + -0.5x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -0.5x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -0.5x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -0.5x + x2 = 0 + 0.6666666667
-0.5x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-0.5x + x2 = 0.6666666667

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 0.6666666667 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 0.6666666667 + 0.0625

Combine like terms: 0.6666666667 + 0.0625 = 0.7291666667
0.0625 + -0.5x + x2 = 0.7291666667

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 0.7291666667

Calculate the square root of the right side: 0.853912564

Break this problem into two subproblems by setting 
(x + -0.25) equal to 0.853912564 and -0.853912564.

Subproblem 1

x + -0.25 = 0.853912564 Simplifying x + -0.25 = 0.853912564 Reorder the terms: -0.25 + x = 0.853912564 Solving -0.25 + x = 0.853912564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.853912564 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.853912564 + 0.25 x = 0.853912564 + 0.25 Combine like terms: 0.853912564 + 0.25 = 1.103912564 x = 1.103912564 Simplifying x = 1.103912564

Subproblem 2

x + -0.25 = -0.853912564 Simplifying x + -0.25 = -0.853912564 Reorder the terms: -0.25 + x = -0.853912564 Solving -0.25 + x = -0.853912564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.853912564 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.853912564 + 0.25 x = -0.853912564 + 0.25 Combine like terms: -0.853912564 + 0.25 = -0.603912564 x = -0.603912564 Simplifying x = -0.603912564

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.103912564, -0.603912564}

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