Question

find the square of 31 by using Identity (i.e(30+1)*2 _)​

Answer 1

Answer:

Square of 31

( 30+ 1)^2

Using identity (a+b)^2 = a^2+2ab +b^2

(30+1)^2 = 30^2 + 2×30×1 + 1^2

= 900 + 60 +1

= 961

Square of 31 is 961