Question

expand ( 2a by3 minus 1) whole cube​

Answer 1

Step-by-step explanation:

(2a/3 -1)³

= (2a/3)³-3(2a/3)².1+3(2a/3)(1)²-(1)³

= (8a/27)-(4a/3)+2a-1

Answer 2

Answer:

use the identity (a-b)^=a^3-b^3-3ab(a-b)

u will get the answer

try it...