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Please help me out no answers like I didn't got etc​

Answer»

-step EXPLANATION:The first 2 TERMS REPRESENT (a+b)(a-b)=(9p^2-q^2) + (p^2-pq+3pq-3q^2)=9p^2-q^2+p^2+2pq-3q^2=10p^2+2pq-4q^2



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