If you actually carry out the multiplication, you'll get a single number as a result. It can't get simpler than that.
18/49 cannot be simplified since 18 and 49 don't have the common factors. Check: 18 = 3 x 6 = 3 x 2 x 3 = 2 x 3² 49 = 7² So these terms don't have the common factors. So 18 / 49 is in simplest form.
57 = 3 x 19 [neither of which are perfect squares], so it is already simplest form.
Yes. The two have no common factors. 49 = 7 x 7 54 = 2 x 3 x 3 x 3
311 x 49 = 15239 3/11 x 4/9 = 12/99 = 4/33
8
49 is not prime - its prime factorization is 72. 57 is not prime - its prime factorization is 19 x 3.
x - 1 is in its simplest form.
3 x 20 = 60 3 x 19 = 57 3 x 18 = 54 3/54 = 1/18
x/10y is in its simplest form.
The simplest radical form of x is just the square root of x.
X=(49+7)+1x=56+1x=57
x^4 is in its simplest form.