ok there is a many confusion below soIwill watch if Ican help to straighten it the end for the is fairly important.

You are watching: What is 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 price is 7 (Just 7 NOT -7)

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

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However, if the inquiry is

$$\x^2=49 qquad findquad x \\ $That is different due to the fact that the square source is no written right into the original question.$\\ x=pmsqrt47=pm7$$

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Please, if you desire to questioning questions do so because this is important.


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

So.... √49 = 7

But

x2 = 49

x = ±√49 = ± 7


CPhill Jan 8, 2015
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