Question

If P = 3a + 2b - cand Q = -7a + 4b + 8c then
find P + Q and Q + P. Are they same?​

Answer 1

Answer:

3a+2b-c+(-7a+4b+8c)+(-7a+4b+8c)+3a+2b-c

3a+2b-c-7a-4b-8c-7a+4b+8c+3a+2b-c

3a-7a+3a-7a+2b-4b+2b+4b-c-8c+8c-c

-4a-4a-2b+6b-9c+7c

-8a+4b-2c