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OpenStudy (anonymous):
the lengths of two sides of a triangle are shown below: Side 1: 5x^2+2x-3 Side 2:8x-3x^2+2 The perimeter of the triangle is 2x^3-5x^2+4x-8 Part A: What is the total length of the two sides 1and 2 of the triangle? Part B: what is the length of the third side of the triangle? Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction
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