The largest number is 952. I'll tell you why...
7*8=56
------------
56*18=7*8*18=7*8*3*6=1008 (4 digits)
56*17=7*8*17=952 (3 digits)
A) distributive is where it distributes a number through a set of parenthesis.
I honestly don't know if this is correct but it might be i think its the middle one y=f(x)=x to the second power