Subtract the square of 21 from the square of 22 without actually calculating the squares.
Answers
Answered by
1
Answer:
Given,
We need to Subtract the square of 21 from the square of 22 without actually calculating the squares.
Using the formula
We get.....
Answered by
1
Answer:
we can write 21 as 20+1
if square
we can write 22 as 20+2
if square
by using identity
=43 is the correct answer
Similar questions
Art,
5 months ago
Business Studies,
5 months ago
Computer Science,
5 months ago
History,
11 months ago
Hindi,
1 year ago
Science,
1 year ago