Add the following:
$2 p^{2} q^{2} - 3 p q + 4, 5 + 7 p q - 3 p^{2} q^{2}$

- p^{2} q^{2} - 4 p q + 9

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- p^{2} q^{2} + 4 p q + 9

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- p^{2} q^{2} + 2 p q - 9

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None of these

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Solution

The correct option is B $- p^{2} q^{2} + 4 p q + 9$
$2 p^{2} q^{2} - 3 p q + 4 + 5 + 7 p q - 3 p^{2} q^{2}$

$= 2 p^{2} q^{2} - 3 p^{2} q^{2} - 3 p q + 7 p q + 9$

$= - p^{2} q^{2} + 4 p q + 9$

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Question 57 (a)

Add the following expression:

$p^{2} - 7 p q - q^{2} a n d - 3 p^{2} - 2 p q + 7 q^{2}$

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