#1**0 **

*What is the square root of 16?*

It's __+__4. Don't forget there are two roots, one positive and one negative.

_{.}

Guest Oct 20, 2020

#2**0 **

The square root of 16, as Guest said, would be 4 and -4.

Note that (-4)^2 and 4^2 both equal 16 :)

CalTheGreat Oct 20, 2020

#3**+1 **

**Question: **What is the square root of 16?

**Answer: ****√16 = 4**

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The fact is that -4^{2} = 4^{2} = 16 but sqrt(16) = 4

5 + sqrt(16) = 5 + 4 = 9

5 - sqrt(16) = 5 - 4 = 1

Dragan Oct 20, 2020

#4**+1 **

Dragan is correct

\(\sqrt{16}=+4\qquad \text{By convention}\\~\\ \\But\\ if\;\;y^2=16\\then\\ y=\pm\sqrt{16}=\pm4 \)

So if the sqrt root sign or the power of 1/2 is already in the question then the answer is positive (by convention).

But

If you add the square root in, as a part of the solution THEN the answer is positive OR negative.

Melody
Oct 21, 2020