Question

factorisation of 1-27a³ will be​

Answer 1

Answer:

(1 - 3a) (1 + 3a + 9a²)

Step-by-step explanation:

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Answer 2

Answer:

1 - 36a - 27a²

Step-by-step explanation:

1 - 27a³

(1)³ - (3)³a³

(1)³ - (3a)³

= (1)³ - (3a)³ - 3*(1*3a) * (1-3a)

= 1 - 27a - 9a * (1-3a)

= 1 - 27a - 9a - 27a²

= 1 - 36a - 27a²