Question

Write the following cube in expanded form 2a - 3b whole cube

Answer 1

$\bold{Question\:=>\:}$

$\bold{(2a-3b)^3}$

$\bold{Answer\:=>\:}$

$\boxed{(x-y)^3=x^3-3x^2y+3xy^2-y^3}$

$\bold{x=2a\:,\:y=3b}$

[substitute the values]

$\bold{(2a-3b)^3=2a^3-3(2a)^2.3b+3.2a.(3b)^2-3b^3}$

$\bold{=\: 8a^3 - 3.4a^2.3b+6a.9b^2 - 27b^3}$

$\bold{=\: 8a^3 - 36a^2b + 54ab^2 - 27b^3}$

$\boxed{Therefore\:(2a-3b)^3=\: 8a^3 - 36a^2b + 54ab^2 - 27b^3}$

Answer 2

Answer:

8a³ - 36a²b + 54ab² - 27b³

Step-by-step explanation: