Question

factorise:x3-9y3-3xy(x-y)
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Answer 1

Step-by-step explanation:

x3-9y3-3xy(x-y)

=x3-(3y)3-3xy(x-y)

=(x-3y)3

Answer 2

Answer:

(x-3y)(x²+3y²)

Step-by-step explanation:

x³-9y³-3xy(x-y)

=[x³-9y³+8y³-3xy(x-y)]-8y³

=[x³-y³-3xy(x-y)]-8y³

=(x-y)³-(2y)³

=(x-y-2y)(x²+y²-2xy+4y²+2xy-2y²)

=(x-3y)(x²+3y²)

Hope it helps you...

Pls mrk me brainliest...