Question 117268
3sqrt(2x^3) - sqrt(8x^3)

=3(2x^3)^1/2 -(8x^3)^1/2

=2sqrt(2)(x)^3/2 - sqrt(8)(x)^3/2

=2sqrt(2)(x)^3/2 - 2sqrt(2)(x)^3/2
=0

Hope that helps.

Greetings,
misscrt