Question

2(x-y)^2 - (x-y)-21 factorise this​

Answer 1

Answer:

$2 {(x - y)}^{2} - (x - y) - 21 \\ \\ i \: do \: not \: know \: factorisation \\ so \: sorry$

Answer 2

Answer:

(2x-2y)²-(21x+21y)

(2x-2y)-21x-21y

4x²+4y²-8xy-21x-21y