Respuesta :

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Ex 9.1, 3 (iii) - Chapter 9 Class 8 Algebraic Expressions and Identities ... Davneet Singh is a graduate from Indian Institute of Technology, ...
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Answer:

[tex]12xy - 3 {p}^{2} {q}^{2} + 7pq - 8 {r}^{2} \\ + \\ 2xy + 3 {p}^{2} {q}^{2} - 8pq + 4r \\ = 14xy - pq - 4r[/tex]