Question

Factorise :
a) 27 - b³


b) x³ + 1​

Answer 1

Answer:

is this your answers?

Step-by-step explanation:

a) 27 - b^3

${3}^{3} - {b}^{3} = (3 - b)( {3}^{2} + {b}^{2} + 3b) \\ = (3 - b)(9 + {b}^{2} + 3b)$

b) x

${x}^{3} + 1 = {x}^{3} + {1}^{3} = (x + 1)( {x}^{2} + {1}^{2} + x.1) \\ = (x + 1)( {x}^{2} + 1 + x)$

Answer 2

Given:

a) $27- b^{3}$

b) $x^{3} +1$

To Find:

Factorise the following:

a) $27- b^{3}$

b) $x^{3} +1$

Solution:

Please have a look at the attachment.