Question

Easy question!

Which is a difference of cubes?

a) x^6 – 27
b) x^15 – 36
c) x^16 – 64
d) x^5 – 125

Answer 1

Any ideas?

Answer 2

this is an example

Answer 3

c

Answer 4

x^16-64

Answer 5

why?

Answer 6

8*8=64

Answer 7

how does that fit the pattern of being a "difference of cubes"?

Answer 8

its D

Answer 9

why?

Answer 10

because 5^3=125

Answer 11

prove it by writing it as a difference of cubes

Answer 12

you are right 5^3 = 125, but what about x^5?

Answer 13

0