What is the square root of 7921?

1 Answer
José F.
Mar 20, 2018

89

Explanation:

What's the bigger perfect square minor than 7921?
is 64.
The square root will start by a 8 (#sqrt(64)#)

1) Subract 6400 from 7921 and you obtain 1521.

2)take 8 multiply it by 20 and add find the larger number

#bar(16n)xxn# smaller or equal than 1521. #169xx9# is exactly 9

3) so the solution is 89

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