Question

using identity evaluate each of the following(399)^2​

Answer 1

Step-by-step explanation:

hi iiiiiiii hope it's right

Answer 2

◦•●◉✿ αиѕωєя ✿◉●•◦

Heya mate..!

We can write (399)^2 as.... (400-1)^2

So...

Using identety (a-b) ^2

We get.!

400^2 - 2 (400) (1) + 1^2

=160000 - 800 + 1

= 159201..........(ans...)