+0  
 
0
1936
7
avatar
what are the different square roots of 49
Guest Jan 7, 2015

Best Answer 

 #4
avatar+17721 
+8

Go with Anonymous's answer because 

not only is 7 an answer because (7)(7) = 49

but also -7 is an answer because (-7)(-7) = 49      

         (a negative number times a negative number has a positive anwer).

geno3141  Jan 7, 2015
Sort: 

7+0 Answers

 #1
avatar+7188 
+5

There is only one square root of 49........that would be 7

happy7  Jan 7, 2015
 #2
avatar
+5

-7 and 7          

Guest Jan 7, 2015
 #3
avatar+11847 
+8

There is only one square root of 49 that's 7.its like

 

√7=49

 

or

7*7 = 49

rosala  Jan 7, 2015
 #4
avatar+17721 
+8
Best Answer

Go with Anonymous's answer because 

not only is 7 an answer because (7)(7) = 49

but also -7 is an answer because (-7)(-7) = 49      

         (a negative number times a negative number has a positive anwer).

geno3141  Jan 7, 2015
 #5
avatar
+5

geno, you can never square root a number and get a negative

Guest Jan 7, 2015
 #6
avatar+92225 
+5

ok there is a lot of confusion here so I will see if I can help to straighten it out for it is quite important.

 

Firstly  7*7=49     AND    (-7)*(-7)=49

-----------------------------------------------------

Now if the question is  $$\sqrt{49}$$   then the answer is 7     (Just 7 NOT -7)  

 

This is because if the square root is written into the original question ONLY the positive answer counts.  That is a convention

----------------------------------------------------

However,  if the question is   

$$\\x^2=49 \qquad find\quad x \\\\
$That is different because the square root is not written into the original question.$\\\\
x=\pm\sqrt{47}=\pm7$$

 

---------------------------------------------------

Please, if you want to ask questions do so because this is important.

Melody  Jan 8, 2015
 #7
avatar+85819 
+5

The convention is that we assume the positive root, unless we are solving an equation...

So.... √49 = 7

But

x2 = 49

x = ±√49 = ± 7

 

CPhill  Jan 8, 2015

16 Online Users

avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details