Question

Please give a genuine answer!!!!

The lengths of two sides of a triangle are shown.

Side 1: 8x2 − 5x − 2

Side 2: 7x − x2 + 3

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? Justify your answer. (2 points)

Answer 1

Step-by-step explanation:

Correct option is

A

8x

2

−7x−4

Given polynomials are 3x

2

−5x+2 and 5x

2

−2x−6

The sum of the given polynomials is given by:

(3x

2

−5x+2)+(5x

2

−2x−6)

=(3x

2

+5x

2

)+(−5x−2x)+(2−6)

=(3+5)x

2

−(5+2)x−4

=8x

2

−7x−4

Answer 2

Refer the pic.

Hope it helps.