Question

Factorize :
(1) 343a' – 729b

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Answer 1

This can be written as

343a-729b

=(7a³) - (9b³)

take it in a³-b³

=(a-b)(a²+ab+b²)

=(7a-9b) {(7a)²+7a×9b+(9b)²}

=(7a-9b) (49a²+63ab+81b²)

Answer 2

Answer:

Step-by-step explanation:

The question is wrong it should be 343a^3-729b^3. Ans. (7a)^3-(9b)^3

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

Put value(7a-9b)^3*7a*9b(7a-9b)

Take 7a-9b common

(7a-9b) [(7a-9b)^2+189ab]

(7a-9b)(49a^2+81b^2+63ab