Question

What is the square root of 5 times the square root of 3?

Answer 1

What is `sqrt(5) xx sqrt(3)`?

Use this rule for radicals: `sqrt(color(red)(a)) * sqrt(color(blue)(b)) = sqrt(color(red)(a) * color(blue)(b))`

Substituting gives:

`sqrt(color(red)(5)) * sqrt(color(blue)(3)) => sqrt(color(red)(5) * color(blue)(3)) => sqrt(15)` Or, approximately 3.873