Question

find the square of 49 using the identity (a+b)=a+2ab+b

Answer 1

solution is 2401 which is solved on paper

Answer 2

(50-1)²=50²-2*50*1+1²

=>2500-100+1

=>2401ans


or,


(48+1)²=48²+2*48*1+1²

=>2304+96+1

=>2401ans