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what are the different square roots of 49
Guest Jan 7, 2015

Best Answer 

 #4
avatar+17745 
+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
 #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+17745 
+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+93365 
+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+88980 
+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

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