Question

Factorise 1+8x³
answer the question please​

Answer 1

Answer:

In general

a3+b3=(a+b)(a2−ab+b2)

(you can verify this by multiplying it out if you are not familiar with this relationship).

8x3+1

=(2x)3+(1)3=(2x+1)(4x2−2x+1)

Answer 2

In general  

a 3 + b 3 = ( a + b ) ( a 2 − a b + b 2 )

(you can verify this by multiplying it out if you are not familiar with this relationship).

8 x^ 3 + 1

 = ( 2 x )^ 3 + ( 1 )^ 3

= ( 2 x + 1 ) ( 4 x^ 2 − 2 x + 1 )