Question

1 WRITE THE FOLLOWING CUBES IN EXPANDED FORM

i) (2x+1)³)

Answer 1

(a+b)^3=a^3+b^3+3ab (a+b)
Using above identity
(2x)^3+1^3+3.2x.1 (2x+1)
8x^3+1+12x^2+6x