MCQ
Add the following: $2p^2q^2 - 3pq + 4, 5 + 7pq - 3p^2q^2$
- A$-p^2q^2 - 4pq + 9$
- ✓$-p^2q^2 + 4pq + 9$
- C$-p^2q^2 + 2pq - 9$
- DNone of these
✓
Answer
Correct option: B.
$-p^2q^2 + 4pq + 9$
$2p^2q^2 - 3pq + 4 + 5 + 7pq - 3p^2q^2$
$= 2p^2q^2- 3p^2q^2 - 3pq + 7pq + 9$
$= -p^2q^2 + 4pq + 9$
$= 2p^2q^2- 3p^2q^2 - 3pq + 7pq + 9$
$= -p^2q^2 + 4pq + 9$
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