Question

Find the square of 81 using identity

Answer 1

Answer:

9 is the correct answer

I hope this is the correct answer.....

thank u......

Answer 2

Step-by-step explanation:

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

a=80,b=1

(80+1)^2=(80)^2+2×80+1+1

(81)^2=6400+162+1

(81)^2=6563