the perimeter of a traingle is 7p2-8p+9 and two of its side are 2p2-p+1 and 11p2-3p+5 .Find
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Step-by-step explanation:
third side=7p²-8p+9-{ (2p²-p+1)+(11p²-3p+5) }
7p²-13p²-8p-4p+9-6
=-6p²-12p+3
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