Question

what is the value of root 16​

Answer 1

$\sqrt{16}$

$= > \ \sqrt{<u>2</u><u>\</u><u>times</u> <u>2</u> \times <u>2</u><u>\</u><u>times</u><u> </u>2}$

$= > 2 \times 2$

$= > 4$

Answer 2

Most students studying in 10th will say that √16 is -4 and +4..

But it's actually wrong...

√16 is always 4

Why?????

Then why the teachers said that √16 is -4 &+4???

Bcz....they don't know when to use -4!!!

➡️ Situation to use -4&+4

Suppose let x = -4

x²=-4²

x²=16

So x=-4 or +4

Same way for x=4

.......

So if u substitute x or unknown number only, use -4&+4

If the question directly comes √16..

Then it's definitely+4 only