7p²+q²-8p²-q² p=-1,q=1,r=2
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Answer:
15 is the right answer
Step-by-step explanation:
7p^2 + q^2 - 8p^2 -q^
= 7*1^2 + 1^2 -8*1^2 -1^2
=7*1 + 1 -8*1 -1
=7+1-8+1
=15
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