Question

evaluate 185×185-15×15

Answer 1

sol;   185*185-15*15

= 34225-225

34000

ans:- 34000

Answer 2

185×185-15×15=185^2-47^2{using identity(x^2-y^2)=(x-y)(x+y)}

=(185-15)(185+15)

=170×200

= 34000

Hope it is helpful