6x(x+4)=3x-2

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Solution for 6x(x+4)=3x-2 equation:


Simplifying
6x(x + 4) = 3x + -2

Reorder the terms:
6x(4 + x) = 3x + -2
(4 * 6x + x * 6x) = 3x + -2
(24x + 6x2) = 3x + -2

Reorder the terms:
24x + 6x2 = -2 + 3x

Solving
24x + 6x2 = -2 + 3x

Solving for variable 'x'.

Reorder the terms:
2 + 24x + -3x + 6x2 = -2 + 3x + 2 + -3x

Combine like terms: 24x + -3x = 21x
2 + 21x + 6x2 = -2 + 3x + 2 + -3x

Reorder the terms:
2 + 21x + 6x2 = -2 + 2 + 3x + -3x

Combine like terms: -2 + 2 = 0
2 + 21x + 6x2 = 0 + 3x + -3x
2 + 21x + 6x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
2 + 21x + 6x2 = 0

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

Divide each side by '6'.
0.3333333333 + 3.5x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 3.5x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 3.5x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 3.5x + x2 = 0 + -0.3333333333
3.5x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
3.5x + x2 = -0.3333333333

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = -0.3333333333 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = -0.3333333333 + 3.0625

Combine like terms: -0.3333333333 + 3.0625 = 2.7291666667
3.0625 + 3.5x + x2 = 2.7291666667

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 2.7291666667

Calculate the square root of the right side: 1.652018967

Break this problem into two subproblems by setting 
(x + 1.75) equal to 1.652018967 and -1.652018967.

Subproblem 1

x + 1.75 = 1.652018967 Simplifying x + 1.75 = 1.652018967 Reorder the terms: 1.75 + x = 1.652018967 Solving 1.75 + x = 1.652018967 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 1.652018967 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 1.652018967 + -1.75 x = 1.652018967 + -1.75 Combine like terms: 1.652018967 + -1.75 = -0.097981033 x = -0.097981033 Simplifying x = -0.097981033

Subproblem 2

x + 1.75 = -1.652018967 Simplifying x + 1.75 = -1.652018967 Reorder the terms: 1.75 + x = -1.652018967 Solving 1.75 + x = -1.652018967 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -1.652018967 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -1.652018967 + -1.75 x = -1.652018967 + -1.75 Combine like terms: -1.652018967 + -1.75 = -3.402018967 x = -3.402018967 Simplifying x = -3.402018967

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.097981033, -3.402018967}

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