Safalta Safalta Exam Preparation Online

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Preeti Tripathi

Class 9th
Maths
2 years ago
Content Issue Not Relevent Obscene Threatening Wrong Information Other

Factorise 64a3 – 27b3 – 144a2b + 108ab2.

1 Answer
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Abhishek Mishra

2 years ago

Solution: 64a2 – 27b2 – 144a2b + 108ab2 = (4a)3 – (3b)3 – 36ab(4a – 3b) = (40)2 – (3b)3 – 3 × 4a × 3b (4a – 3b) = (4a – 3b)3 [∵ (x – y)3 = x3 – y3 – 3xy(x – y)] = (40 – 3b) (4a – 3b) (4a – 3b)

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