Question

Factorise x³-y³-9xy-27. First one to answer will be brainliest.

Answer 1

Answer:

x³-y³-9xy-27

= (x)³-(y)³-3×3×x×y-3³

= (x-y)³-3³-3×3×x×y

= (x-y+3)(x²+xy+9-9xy)

= (x-y+3)(x²-9xy+9)

Please mark me as brainliest.