Question

The lengths of two sides of a triangle are shown below:

Side 1: 3x2 - 2x - 1

Side 2: 9x + 2x2 - 3

The perimeter of the triangle is 5x3 + 4x2 - x - 3.

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)

Answer 1

What do you not understand?

Answer 2

Part A B C

Answer 3

What about part A do you not understand?