Factorise:
a) 3m (a – 3b) + 2n ( a – 3b)
b) a³ – a²b + ab² – b³
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Answered by
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Step-by-step explanation:
a) 3m(a-3b) + 2n(a-3b)
= 3ma-9mb+2na-6nb
b) a³-a²b+ab²-b³
= a³-b³-a²b+ab²
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