Question

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

Answer 1

"foil" is just multiplication:

15
3
---
45


8+7: 15
1+2: 3
----------
16+14
8+7
--------
8+23+14 = 45

Answer 2

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

Answer 3

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

Answer 4

you use it, but its the same principles

Answer 5

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

Answer 6

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

Answer 7

i have the -16x^2 first

Answer 8

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

Answer 9

aahh yes i forgot about that

Answer 10

so that would be my answer?