Correct Answer - Option 1 : -17p
2 + 22q
2 + 5p
2q + 7q
Calculation:
2(A - C) + B
⇒ 2[(2p2 + 3q2 - p2q) - (4p2q + 6p2 - 8q2)] + (7q - 9p2 + 5p2q)
⇒ 2[2p2 + 3q2 - p2q - 4p2q - 6p2 + 8q2)] + (7q - 9p2 + 5p2q)
⇒ 2(-4p2 + 11q2 - 5p2q) + (7q - 9p2 + 5p2q)
⇒ -8p2 + 22q2 - 10p2q + 7q - 9p2 + 5p2q
∴ -17p2 + 22q2 + 5p2q + 7q
The correct option is 1 i.e. -17p2 + 22q2 + 5p2q + 7q