Question

using suitable identies find the following. i.( 405)² , ii. 48×52​

Answer 1

Answer:

1. 405² = (400+5)² = 400²+5²+2(400)(5)

= 160000 + 25 + 4000

= 164025...

2. 48 × 52 = (50-2)(50+2)

= (50-2)²

= 48² = 2304.....

Hope it helps...!!!