a) √3 x √15
b) √32 x √24
c) 2√5 x 5√2
Remember that
And that
1)
so
How would this simplify?
2)
And
Substitute these into the equation and then simplification should become clear.
3)Write this as:
Simplifying from here should be straightforward.
Reply if you are still stuck and I'll try to be of more assistance.