Question

Factor and solve

a^3n -b^3n

Answer 1

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwj4-5Ll0e3KAhVMQCYKHQC1BS0QFggdMAA&url=http%3A%2F%2Fwww.purplemath.com%2Fmodules%2Fsolvquad3.htm&usg=AFQjCNHXsBAHX5K4kyL7qKscicYDCCfMNA

Answer 2

is it \[a ^{3n}\]

Answer 3

a^n-b^n(a^2n+b^2n+a^nb^n)

Answer 4

I'm completely lost....... I don't understand :( sorry

Answer 5

ok
we know that a^3-b^3=(a-b)(a^2+b^2+ab)

Answer 6

instead of a we are using a^n

Answer 7

So I use sum or difference of cubes?

Answer 8

difference of cubes

Answer 9

also if (a^n)^2=a^2n we multiply the powers

Answer 10

\[a^n-b^n(a^2n+b^2n+a^nb^n)\] this general idea, just to make it clear
is not like this \[a^n-b^n(a2n+b2n+anbn)\]

Answer 11

I got the same answer as you @Andresfon12

Answer 12

@Maddiem is it \[a ^{3n}\]

Answer 13

yes

Answer 14

so as i have done it above is the right procedure

Answer 15

that just a general formula he @ kanwal32 gave you, no the answer

Answer 16

OKay! thanks guys for the help :D

Answer 17

np

Answer 18

welcome