When using the negative exponent properties, why is it important to know if any of the variables is equal to 0?

Because that give you something like this who is undefined.

Step-by-step explanation:

When you raise something to a negative exponent give you:

Then if is equal to 0 is considerate undefined because whatever number raising 0 is equal to 0.

This video explain why you can't divide by zero if you want a deepest 'Why can't you divide by zero? - TED-Ed'

The father is 80 years now and the son 20 years

Step-by-step explanation:

20+20=40

20+80=100