Question

Q1) 4a + 7b +5a - b
Q2) 6c + 4d - c - 7 d

Answer 1

4a+5a+7b-b

the first thing is to put the like terms together

Explanation:

then add or subtract as given after pairing.

Therefore;

our answer is; 9a+6b

since it is factorisable we can further write it this way; 3(3a+2b)

q2) 6c+4d-c-7d

we first put the like terms together

6c-c+4d-7d

we then add and subtract

5c-3d

since our answer is not factorisable we leavem;

5c-3d as our final answer