Question

question in comments

Answer 1

\[\sqrt{3}\times \sqrt{21}\]

Answer 2

\[\sqrt{3x21}= \sqrt{63}\]

Answer 3

thanks

Answer 4

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