Question

3 a×a ×b×b×b - 27 a×a×a×a×b factorise using the identity a×a -b×b= (a+b)(a-b)​

Answer 1

3a²b³-27a⁴b

3a²b(b²-9a²)

3a²b((b)²-(3a)²)

3a²b(b+3a)(b-3a)

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