The perimeter of a triangle is 7p2 - 5p + 11 and two of its sides are p2 + 2p - 1 and
3p2 - 6p + 3. Find the third side of the triangle.
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7p2 - 5p + 11 = sum of all sides.
Since two of them are already given, the third side = 7p2 - 5p + 11 - ( p2+2p-1 + 3p2 - 6p + 3) = 7p2 - 4p2 - 5p - 4p + 11 + 2 => 3p2 -9p+13.
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Since two of them are already given, the third side = 7p2 - 5p + 11 - ( p2+2p-1 + 3p2 - 6p + 3) = 7p2 - 4p2 - 5p - 4p + 11 + 2 => 3p2 -9p+13.
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