3p 2 q 2 – 4pq + 5, -10p 2 q 2 , 15 + 9pq + 7p 2 q 2
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Answer:
10 p^2q^2 -13pq +20
Step-by-step explanation:
(3p^2q^2 -4pq +5) +(15 -9pq+ 7p^2q^2)
= 3p^2q^2+7p^2q^2 -4pq -9pq +5 +15
=10 p^2q^2 -13pq +20
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