Question

If m=7x+9, and n=7y+8, what is the remainder when m*n is divided by 7

Answer 1

Dividend=(divisor)(quotient)+remainder

(7x+9)(7y+8)=49xy+56x+63y+72

7(7xy+8x+9y)+72

According to the format anything be the quotient the remainder will always be 72