Question

please tell me fast (3x+y)*3​

Answer 1

Answer:

(9x+3y)

Step-by-step explanation:

(3x+y)×3

3×3x+3×y

9x+3y

Answer 2

Identify used :

(a+b)³ = a³ +b³ + 3a²b +3 ab²

Step-by-step explanation:

Please see the above image for better understanding.