Question

factorise 27a3 - 343b3​

Answer 1

Answer:

( 3a-b) ( 3a ^2 +3ab + b^2)

Step-by-step explanation:

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Answer 2

Answer : ( 3a - 7b ) ( 9a² + 21ab + 49b²)

Solution :-

a³ - b³ = (a-b) ( a² + ab + b²)

where , a = 3a and b = 7b

=> ( 3a - 7b ) { (3a)² + (3a)(7b) + (7b)² }

=> ( 3a - 7b ) ( 9a² + 21ab + 49b²)