The lengths of two sides of a triangle are shown side 1. 3x^2 - 4x - 1. Side 2. 4x - x^2 + 5 the perimeter of the triangle is 5x^3 -2x^2 + 3x - 8 what is the total length of the two sides one and two of the triangle show your work part B what is the length of the third side of the triangle show your work part Sidhu the answers for part a and part B show that the polynomials are closed under addition and subtraction justify your answer
