Question

he 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

i did part A already i need part B and C please :)))

Answer 2

huh im kind of confused

Answer 3

for part A i got 5x^2+7x-4

Answer 4

i added like terms of both equations

Answer 5

perimeter - (side 1 + side 2) = side 3

Answer 6

so the same thing as part A then?

Answer 7

IDK, do the calculation

Answer 8

i did and i got 5x^2+7x-4

Answer 9

is that right????

Answer 10

@jagr2713 i need help please

Answer 11

@ninjasandtigers

Answer 12

to find the third side you would subtract 5x^2+7x-4 from 5x^3+4x^2-x-3

Answer 13

ok thank you i got part B can you help me with part C please?

Answer 14

honestly i have no clue what part c is asking for sorry

Answer 15

its ok thanks anyways

Answer 16

welcome :)