Question

(3a-b+c) + (a +b-3c) - (a-2b-c)​

Answer 1

Step-by-step explanation:

(3a-b+c)+(a+b-3c)-(a-2b-c)

3a-b+c+a+b-3c-a+2b+c

=3a+2b-c

Answer 2

Answer:

3a(a+b-3c) -b(a+b-3c) -(a-2b-c)

3a²+3ab-9ac-ab-b²+3bc-a+2b+c