Help please.. -2√(6k^3) 3√(21k^2) Simplify

Question

jhonyy9 · Answer

exactly what is there ?

-2sqrt(6k^3) * 3sqrt(21k^2) = ?

anonymous · Answer

hmm well thats stupid.. lol my teacher wrote that down and told me to simplify it, but if its already simplified, why have that as a question... Thanks!

jhonyy9 · Answer

so how i have wrote above is right ?

jhonyy9 · Answer

hope is  correct 

so than you need calculi,simplifie first what is inside squareroot 

ok ?

jhonyy9 · Answer

first there is 

sqrt(6k^3) = 

can you continue it ?

jhonyy9 · Answer

you dont like cooperat anything ?

anonymous · Answer

sorry but i dont think you can even simplify sqrt(6k^3), at least i dont think..

jhonyy9 · Answer

why ?

you can rewriting it like 

sqrt(6*k^2 *k) =

jhonyy9 · Answer

hope you know that sqrtk^2 =k

yes ?

than this mean that will be equal  ksqrt(6k)

do you understand it why ?