p+³+27q³+8r³-18pqr factorise
wgmvarsha:
sry p³
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p³+27q³+8r³-18pqr
=p³+(3q)³+(2r)³-3.p.(3q).(2r)
=(p+3q+2r)(p²+3q²+2r²-3pq-6qr-2pr)
=p³+(3q)³+(2r)³-3.p.(3q).(2r)
=(p+3q+2r)(p²+3q²+2r²-3pq-6qr-2pr)
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