8x(3x+6)=4-x

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Solution for 8x(3x+6)=4-x equation:


Simplifying
8x(3x + 6) = 4 + -1x

Reorder the terms:
8x(6 + 3x) = 4 + -1x
(6 * 8x + 3x * 8x) = 4 + -1x
(48x + 24x2) = 4 + -1x

Solving
48x + 24x2 = 4 + -1x

Solving for variable 'x'.

Reorder the terms:
-4 + 48x + x + 24x2 = 4 + -1x + -4 + x

Combine like terms: 48x + x = 49x
-4 + 49x + 24x2 = 4 + -1x + -4 + x

Reorder the terms:
-4 + 49x + 24x2 = 4 + -4 + -1x + x

Combine like terms: 4 + -4 = 0
-4 + 49x + 24x2 = 0 + -1x + x
-4 + 49x + 24x2 = -1x + x

Combine like terms: -1x + x = 0
-4 + 49x + 24x2 = 0

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

Divide each side by '24'.
-0.1666666667 + 2.041666667x + x2 = 0

Move the constant term to the right:

Add '0.1666666667' to each side of the equation.
-0.1666666667 + 2.041666667x + 0.1666666667 + x2 = 0 + 0.1666666667

Reorder the terms:
-0.1666666667 + 0.1666666667 + 2.041666667x + x2 = 0 + 0.1666666667

Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000
0.0000000000 + 2.041666667x + x2 = 0 + 0.1666666667
2.041666667x + x2 = 0 + 0.1666666667

Combine like terms: 0 + 0.1666666667 = 0.1666666667
2.041666667x + x2 = 0.1666666667

The x term is 2.041666667x.  Take half its coefficient (1.020833334).
Square it (1.042100696) and add it to both sides.

Add '1.042100696' to each side of the equation.
2.041666667x + 1.042100696 + x2 = 0.1666666667 + 1.042100696

Reorder the terms:
1.042100696 + 2.041666667x + x2 = 0.1666666667 + 1.042100696

Combine like terms: 0.1666666667 + 1.042100696 = 1.2087673627
1.042100696 + 2.041666667x + x2 = 1.2087673627

Factor a perfect square on the left side:
(x + 1.020833334)(x + 1.020833334) = 1.2087673627

Calculate the square root of the right side: 1.099439568

Break this problem into two subproblems by setting 
(x + 1.020833334) equal to 1.099439568 and -1.099439568.

Subproblem 1

x + 1.020833334 = 1.099439568 Simplifying x + 1.020833334 = 1.099439568 Reorder the terms: 1.020833334 + x = 1.099439568 Solving 1.020833334 + x = 1.099439568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.020833334' to each side of the equation. 1.020833334 + -1.020833334 + x = 1.099439568 + -1.020833334 Combine like terms: 1.020833334 + -1.020833334 = 0.000000000 0.000000000 + x = 1.099439568 + -1.020833334 x = 1.099439568 + -1.020833334 Combine like terms: 1.099439568 + -1.020833334 = 0.078606234 x = 0.078606234 Simplifying x = 0.078606234

Subproblem 2

x + 1.020833334 = -1.099439568 Simplifying x + 1.020833334 = -1.099439568 Reorder the terms: 1.020833334 + x = -1.099439568 Solving 1.020833334 + x = -1.099439568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.020833334' to each side of the equation. 1.020833334 + -1.020833334 + x = -1.099439568 + -1.020833334 Combine like terms: 1.020833334 + -1.020833334 = 0.000000000 0.000000000 + x = -1.099439568 + -1.020833334 x = -1.099439568 + -1.020833334 Combine like terms: -1.099439568 + -1.020833334 = -2.120272902 x = -2.120272902 Simplifying x = -2.120272902

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.078606234, -2.120272902}

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