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help pls Find the number of integers $n$ that satisfy $n^2 < 100.$

 Apr 27, 2020
 #1
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+1

1,2,3,4,5,6,7,8,9

1^2=1

2^2=4

3^2=9

4^2=16

5^2=25

6^2=36

7^2=49

8^2=64

9^2=81

 Apr 27, 2020
 #2
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+1

take square root both sides

\(n<10\) 

but that is the positive square root, 

\(-10  n is between the negative and positive square root of 100.

Thus, \(n={{-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9}}\)

 Apr 27, 2020

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