Simple mutiplication vector problem

[physixfail]

Homework Statement

if vector d1=3i-2j+4k and d2=-5i+2j-k then what is (d1+d2).(d1x4d2)? (period between brackets indicates "dot"

Homework Equations

mutiplication

The Attempt at a Solution

so i got d1+d2=-2i+0j+3k and d1x4d2=-24i-68j-16k
what do i do next?
is the answer (-2)(-24)+(0)(-68)+3(-16)?

thanks!

 

[CanIExplore]

Yes that's correct, memorize how to calculate the vector product and dot product of vectors, its essential for physics.