Question

Using suitable identity evaluate square of 395.​

Answer 1

Answer:

1,56,025

Step-by-step explanation:

We can write (395)² as (400-5)²

(400-5)²

using Identity (a-b)²=a²+b²-2ab

(400)²+(5)²-2×400×5

160000+25-4000

=1,56,025

Answer 2

we can write 395 as

(400-5)^2

Using identity a^2-2ab+b^2

=400^2-2(400)(5)+5^2

=160000-4000+25

=156025