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 (√64)

1) Subract 6400 from 7921 and you obtain 1521.

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

¯¯¯¯¯¯16n×n smaller or equal than 1521. 169×9 is exactly 9

3) so the solution is 89

Related questions
See all questions in Simplification of Radical Expressions
Impact of this question
4168 views around the world
You can reuse this answer
Creative Commons License