Question

using identity find 501*506

Answer 1

the identity used will be (x plus a) (x-b)
(500 plus 1) (500-6)

Answer 2

firstly
501=(500+1)and 506=(500+6)
(500+1)*(500+6)
using identity (x+a)*(x+b)=x^2+(a+b)*x+a*b
500^2+(1+6)*500+(1*6)
250000+3500+6=253506