Question

add : 6pq+13qr-5rs,8pq-12qr-23rs and 7pq+8qr+9rs

who will give the corr answer I will mark it as brainliest​

Answer 1

Answer:

21pq + 9qr - 19rs

Step-by-step explanation:

( 6pq + 13qr - 5rs ) + ( 8pq - 12qr - 23rs ) + ( 7pq + 8qr + 9rs)

= 6pq + 13qr - 5rs + 8pq - 12qr - 23rs + 7pq +8qr + 9rs

= (6pq + 8pq + 7pq) + (13qr -12qr +8qr) + (-5rs -23rs + 9rs)

= 21pq + 9qr -19rs