Question

Find the square of 27 without actual multiplication

Answer 1

27 can be written as 20+7

27^2=(20+7)^2

it is in the form (a+b)^2=a^2+b^2+2ab

(20+7)^2=20^2+7^2+2×20×7
=400+49+280
= 729

Answer 2

Answer:

the correct answer is 729