Question

Factorise-
a) 27 - b³


b) x³ + 1

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Answer 1

Answer:

a)a³-b³=(a-b)(a²+ab+b²)

27-b³=(3-b)(9+3b+b²)

b)a³+b³=(a+b)(a²-ab+b²)

x³+1=(x+1)(x²-x+1)

hope it helps you and don't forget to follow mè

Answer 2

Answer:

3^3-b^3

i.e. (3-b) ^3+9b(3-b)