# How do you simplify #sqrt (15x) * (21x)#?

##### 1 Answer

May 18, 2015

By exponentiial rules, we know that

So, in this case, if we rewrite your product:

We can sum the exponentials of the variable

Simpifying more, we can even factor the constants, as both are multplied by three:

Transforming all these exponentials into roots: