Question

What is the expand form of cubic identity = (2a+b)³

Answer 1

Answer:

Step-by-step explanation:

Using identity,

(a – b)³ = a³–b³ – 3ab(a – b)

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

=8a³+ b³–18ab (2a + b)

= 8a³+ b³–36a²b + 18ab²