Question

factorise (3a – 2b)^3​

Answer 1

Answer:

27a^3 - 8b^3 - 54 a^2b + 36ab^2

Step-by-step explanation:

The formula is (a-b)³=a³-3a²b+3ab²-b³.

so

(3a-2b)^3= =(3a)^3 - (2b)^3- 3{(3a)^2 (2b)} + 3{(3a)(2b)^3}

27a^3 - 8b^3 - 54a^2b + 36 ab^2

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