proving with modulus on both sides

[Guest cipher]

how do i show that |AB| = |A||B| ?

[jordan]

Well, in words it would be that since lABl equals the positive value of A times B, then lAl times lBl would be the same. The absolute value for both would be a positive number and since a positve times a positive is a positive, it would be the positive value of A times B. Don't know if that's what you're looking for, probably not. It's not really a mathematical proof, but it's what came to mind first.

[Guest cipher]

thanx, though it was not quite what i was looking for it does make a lot of sense.

[Dave]

Again, it's just definitions and such things