Question

solve 390×410 using identity (a+b)(a-b)=a^(2)-b^(2)​

Answer 1

Answer:

hey mate

using identity

(a+b) (a-b) = a²-b²

390×410 = (400-10)(400+10)

= (400)²-(10)²

= 1600-100

= 1500

hope it will help you

Answer 2

Answer:

this is the answer mark me as brainliest