(4x^2-4)(x^6-4) use foil method is the answer 4x^8-16x^2-4x^6+16?

Question

amistre64 · Answer

"foil" is just multiplication:

15
  3
---
45


     8+7: 15
     1+2:  3
----------
   16+14
8+7
--------
8+23+14 = 45

anonymous · Answer

what about the x^2 and stuff? i dont use those?

amistre64 · Answer

4x^2 -4
            x^6 -4
--------------
         -16x^2+16
4x^8-4x^6
--------------------
4x^8-4x^6-16x^2+16

amistre64 · Answer

you use it, but its the same principles

amistre64 · Answer

if you know how to multiply 2 numbers together; you know how to "foil" just a s well.

anonymous · Answer

i know how to foil but how did you get the -4x^6 to come first

anonymous · Answer

i have the -16x^2 first

amistre64 · Answer

i simply wrote it there first.  It doesnt matter what order you add things up in.

but by convention; you arrange the terms in descending degrees

anonymous · Answer

aahh yes i forgot about that

anonymous · Answer

so that would be my answer?