Question

URGENT!!
factor the following expression
20xy

Answer 1

in terms of what?

Answer 2

what do you mean

Answer 3

10 * 2 = 20
5 * 2 = 10

Answer 4

what are you factoring out?

Answer 5

In 20xy = 20*x*y, there are already 3 factors: 20, x and y. x and y are unknown, so they could be any number. It is therefore not possible to factor them any further.
The factor 20, on the other hand, is composite, i.e. it is not a prime number, but it is the (unique) product of prime numbers. As @icalibear already pointed out, 20 =2*2*5, so imho the answer to your question is:
\[2^2*5*x*y\]