## anonymous 4 years ago question in comments

1. anonymous

$\sqrt{3}\times \sqrt{21}$

2. anonymous

$\sqrt{3x21}= \sqrt{63}$

3. anonymous

thanks

4. anonymous

Just remeber that multiplying 2 different square roots is the same as the square root of the multiplication of the numbers. $\sqrt{a}\times \sqrt{b} = \sqrt{a \times b}$