Question

Hasil dari (3a ₋ 2b)³

Answer 1

 Pake segitiga pascal
            1
          1 2 1
         1 3 3 1 = 2³
Ambil yang sudah dibold:
1(3a)³+3(3a)²(-2b)+3(3a)(-2b)²+1(-2b)³
=9a³+3(9a²)(-2b)+3(3a)(4b²)+1(-8b³)
=9a³-54a²b+36ab²-8b³

kalau salah maaf tapi semoga membantu :D

Answer 2

(3a-2b)(3a-2b)(3a-2b)
= (9a²-6ab-6ab+4b²)(3a-2b)
=27a³-18a²b-18a²b+12ab²-18a²b-12ab²-12ab²-8b³
=27a³-54a²b-36ab²-8b³