ok there is a the majority of confusion here soIwill view if Ican help to straighten it the end for that is quite important.

You are watching: Whats the square root of 49

Firstly 7*7=49 and also (-7)*(-7)=49

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Now if the inquiry is $$\sqrt49$$ then the prize is 7 (Just 7 NOT -7)

This is due to the fact that if the square source is written right into the initial question just the positive answer counts. That is a convention.

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However, if the concern is

$$\\x^2=49 \qquad find\quad x \\\\ $That is different since the square root is no written right into the initial question.$\\\\ x=\pm\sqrt47=\pm7$$

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Please, if you desire to asking questions carry out so since this is important.


Melody Jan 8, 2015
 #7
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The convention is that we assume the hopeful root, unless us are fixing an equation...

So.... √49 = 7

But

x2 = 49

x = ±√49 = ± 7


CPhill Jan 8, 2015
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