Question

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, 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)

Please, help i will give a medal to whoever helps me. Thanks so much

Answer 1

@NatsuDragneel

Answer 2

a) 2x^2+10X-1
b)2x^3-7x^2-6x-7