Question

obtain the expansion of following binomial expansion (3/a+4b)3​

Answer 1

Answer:

9/a + 12b

Step-by-step explanation:

(3/a +4b)3 = 3/a X 3 + 4b X 3

(3/a +4b)3 = 9/a + 12b

Answer 2

Answer:

(3/a + 4b)³ = 27/a³ + 64b³ + 108b/a² + 144b²/a.

Step-by-step explanation:

(3/a + 4b)³.

☆ By using 6th algebric identity.

i.e. (a + b) = a³ + b³ + 3a²b + 3ab².

● (3/a + 4/b)³.

(3/a)³ + (4b)³ + 3(3/a)²(4b) + 3(3/a)(4b)².

27/a³ + 64b³ + 3(9/a²)(4b) + 3(3/a)(16b²).

27/a³ + 64b³ + 108b/a² + 144b²/a.