tkhunny said:Some properties might be:
Associative for Addition or Multiplication
Commutative for Addition or Multiplication
Distributive Property of Multiplication over Addition
Are these ringing any bells?
d( -2d + 4) + 15d
Distributive Property of Multiplication over Addition
-2d^2 + 4d + 15d
Associative for Addition
-2d^2 + (4d + 15d)
-2d^2 + 19d
The tutor explained the entire process, both by naming the rules you need to use, and by showing all of the steps. It would be hard to make the explanation much more clear, and yet it seems to be making no sense to you, nor sounding at all familiar to you. This bespeaks a serious lack of background material.collier said:Which means?