Question

Add the following expressions:

p² – 7pq – q² and –3p² – 2pq + 7q²

Answer 1

We have, p² – 7pq – q² + (–3p² – 2pq + 7q²)

= p² – 7pq – q² – 3p² – 2pq + 7q²

On combining the like terms,

= p² – 3p² – 7pq – 2pq – q² + 7q²

= –2p² – 9pq + 6q²