Finding Vectors to Span Set W: Can u and v Fully Represent W?

[cdub2]

I am having some trouble with this problem...

Let W be the set of all vectors of the form:

(-5b-4c
b
c)

^ (that is supposed to be in vector form)

Find vectors u and v such that W = Span {u,v}.

 

[Mark44]

Hint:
x=-5b-4c
y=1b+0c
z=0b+1c

 

[cdub2]

thanks !