Random Question

Factored:

3x² - 21x  =  3x(x - 7)

6x + 8  =  2(3x + 4)

x³ - 14x² + 49  =  <can't be factored>

15x + 20  =  5(x + 4)

To divide fractions, multiply by the reciprocal, so:

=  [3x(x - 7)] / [2(3x + 4)]  times  [5(x + 4] / [ x³ - 14x² + 49 ]

=  [15x(x - 7)(x +4)] / [2(3x + 4)(x³ - 14x² + 49)]

   ...   nothing cancels  ...