Question

expand the following (a+b-1)^3​

Answer 1

Answer:

3a+3b-3

I'm not sure. most probably im wrong

Answer 2

Answer:

a³+b³+3a²b+3ab²-3a²-3b²+3a+3b-6ab-1

Step-by-step explanation:

use (x+y)³ = x³ + y³ + 3a²b + 3ab²

where, a=x and (b-1)=y

and expand.