Please please pleas
The lengths of two sides of a triangle are shown
Side 1: 8x2 - 5X - 2
Side 22
Side 2 7x - x2 + 3
2 *-*
The perimeter of the triangle is 4x3 - 3x2 + 2x - 6.
Part A: What is the total length of the two sides, 1 and 2 of the triangle? Show your work (4 points)
Part B: What is the length of the third side of the triangle? Show your work (4 points)
Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction