+0  
 
0
120
3
avatar

Y^2=4 Y=?

Guest Jul 1, 2017
Sort: 

3+0 Answers

 #1
avatar+4691 
+3

Y2  =  4                    Take the  ± square root  of both sides.

Y    =  ±√4

Y    =  ± 2

hectictar  Jul 1, 2017
 #2
avatar
0

y2 = 4

y=2

because you can take the square root from y2 which gives you y and then take the square root of 4 which is equivalent to 2.

Guest Jul 1, 2017
 #3
avatar+90522 
+2

Sorry guest but Hectictar is correct   :)

 

By convention

\(\sqrt{y^2}=+y\)

that is true

 

BUT this is different becasuse the square root sign is not in the question. So

If

\(y^2=4\\ then\\ y=\pm\sqrt4=\pm2\)

Melody  Jul 2, 2017

23 Online Users

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