Question

2.) The lengths of two sides of a triangle are shown below:
Side 1: 3x^2-4x-1
Side 2: 4x-x^2+5
He perimeter of the triangle is 5x^3-2x^2+3x-8

Part A: What is the total length of the two sides, 1 and 2, of the triangle? (4 points)

Part B: What is the length of the third side of the triangle? (4 points)

Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction? Justify your answer. (2 points)