Question

4p^2-m^2+2mn-n^2/2p+m-n​

Answer 1

  4p²-m²+2mn-n² / 2p+m-n

= (2p)²-[m²-2mn+n²] / 2p+(m-n)

= (2p)²-(m-n)² / 2p+(m-n)

= (2p+m-n)(2p-m+n) / 2p+(m-n)           [∵ a²-b²=(a+b)(a-b)]

= 2p-m+n

hope it helps