Question

Can someone help me with this?

Answer 1

http://prntscr.com/dh7apt

Answer 2

Use the identity a^3 - b^3
- I'll have to look that one up

Answer 3

It's a^3 - b^3 = (a - b)(a^2 + ab + b^2)

Note that the two terms in your expression is 2 perfect cubes so you need to plug values into the above formula

For example a = 4x^3

Answer 4

OK?

Answer 5

R u there?