the perimeter of a triangle is 7p²-8p+9, and two of its sides are 2p²-5p+1 and 8p²-11p+12, find the third side of the triangle
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Step-by-step explanation:
Let X be 3rd side
7p²-8p+9= 8p²-11p+12 + 2p²-5p+1 + X
= X = 10p²-16p+13-7p² +8p-9
= 3p²-8p+4
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