Question

1.(3a-4b+5c)+(-8a+9b-11c)
2.(-7p-6q-11r)+(q-2p-5r)
pake cara ya

Answer 1

1. (3a-4b+5c)+(-8a+9b-11c)
= 3a - 4b + 5c - 8a + 9b - 11c
= 3a - 8a - 4b + 9b + 5c - 11c
= -5a + 5b - 6c

2. (-7p-6q-11r)+(q-2p-5r)
= -7p - 6q - 11r + q - 2p - 5r
= -7p - 2p - 6q + q - 11r - 5r
= -9p - 5q - 16r

maaf kalo salah:-)

Answer 2

1) (3a-4b+5c) + (-8a+9b-11c) =
     -24a2-36b2-55c2

2) (-7p-6q-11r) + (q-2p-5r) =
     -7pq+12pq+55r2