x(3x-8)=48

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Solution for x(3x-8)=48 equation:


Simplifying
x(3x + -8) = 48

Reorder the terms:
x(-8 + 3x) = 48
(-8 * x + 3x * x) = 48
(-8x + 3x2) = 48

Solving
-8x + 3x2 = 48

Solving for variable 'x'.

Reorder the terms:
-48 + -8x + 3x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + -8x + 3x2 = 0

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

Divide each side by '3'.
-16 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + -2.666666667x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + -2.666666667x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -2.666666667x + x2 = 0 + 16
-2.666666667x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
-2.666666667x + x2 = 16

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = 16 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 16 + 1.777777780

Combine like terms: 16 + 1.777777780 = 17.77777778
1.777777780 + -2.666666667x + x2 = 17.77777778

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 17.77777778

Calculate the square root of the right side: 4.216370214

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 4.216370214 and -4.216370214.

Subproblem 1

x + -1.333333334 = 4.216370214 Simplifying x + -1.333333334 = 4.216370214 Reorder the terms: -1.333333334 + x = 4.216370214 Solving -1.333333334 + x = 4.216370214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 4.216370214 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 4.216370214 + 1.333333334 x = 4.216370214 + 1.333333334 Combine like terms: 4.216370214 + 1.333333334 = 5.549703548 x = 5.549703548 Simplifying x = 5.549703548

Subproblem 2

x + -1.333333334 = -4.216370214 Simplifying x + -1.333333334 = -4.216370214 Reorder the terms: -1.333333334 + x = -4.216370214 Solving -1.333333334 + x = -4.216370214 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -4.216370214 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -4.216370214 + 1.333333334 x = -4.216370214 + 1.333333334 Combine like terms: -4.216370214 + 1.333333334 = -2.88303688 x = -2.88303688 Simplifying x = -2.88303688

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.549703548, -2.88303688}

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