Question

(2a+b)cube-(2a-b)cube

Answer 1

(2a + b)^3 = (2a)^3 + 3 (2a)^2 b + 3 (2a) b^2 + b^3 = 8a^3 + 12 (a^2 b) + 6ab^2 + b^3

(2a - b)^3 = (2a)^3 - 3 (2a)^2 b + 3 (2a) b^2 - b^3 = 8a^3 - 12 (a^2 b) + 6ab^2 - b^3

Then subtracting

= 24 (a^2 b) + 2b^3

Answer 2

$\bold {\huge{Ello!!}}$

Here's your answer

______________________

( 2a + b )^3 - ( 2a - b )^3

= { ( 2a + b ) - ( 2a - b ) } [ ( 2a + b )^2 + ( 2a + b ) ( 2a - b ) + ( 2a - b )^2 ]

= ( 2a + b - 2a + b ) [ 4a^2 + 4ab + b^2 + 4a^2 - b^2 + 4a^2 - 4ab + b^2 ]

= 2b [ 12a^2 + b^2 ]

= 24a^2b + 4b^3

_______________________

$<b><u><marquee direction> Hope it helps !!$