Basic Math Question

[wanton grove]

Just need to make sure I get it right, what is : (qr)^2-4p^2 Factorised?

Question 3E

[finite bay]

If you look at worked example part d it tells you how to do it

I think you first simplify 4p^2 to (2p)^2

So it’s (qr-2p)(qr+2p)