abhimahna wrote:

MvArrow wrote:

Hello everyone:

I would like to ask a small (and maybe stupid) question:

Are there any differences between writing |a| = |b| and |a| = b ?

Or in both cases it's A = B or A = -B ?

Thanks a LOT

Hi

MvArrow ,

No, if we are saying |A|= |B| we cannot say |A| = B, because it may happen that b is -ve. In that case, |a| will become -ve but this is against the modulus rules.

So, |A| = B is correct only when we are given that B is positive.

Let me know in case of more doubts.

Thank you for your fast reply!

What I mean is (please tell me if my reasoning is correct):

If I say |A| = |B|, I am saying A = B or A = -B, right?

Instead, what |A| = B means?

Thank you