Question

FAN AND MEDAL
The lengths of two sides of a triangle are shown below:
Side 1: 3x2 - 4x - 1
Side 2: 4x - x2 + 5

The perimeter of the triangle is 5x3 - 2x2 + 3x - 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

Answer 1

I got a and b

Answer 2

@dancergirl45 @Datman21328 @Destinyyyy @Daniellelovee @danielmanzo @FlakeSnow @fluttershyK

Answer 3

@Zeronknight @zaberangelr @zainabkhan

Answer 4

@jigglypuff314 @Ashleyisakitty

Answer 5

@imqwerty @chainedecho @cruffo @cdobbs2017 @ChaosGuardian14

Answer 6

@jhonyy9

Answer 7

just you ned solve these quadratics - do you can ?

Answer 8

@toriacm18 sorry but i not can seniding messages bc. my submit button is blocked again too

Answer 9

3x^2 -4x -1 =0 this is the one from these two quadratics so how is this second ?

Answer 10

here is my answer for a and b
Part A
Total length = side 1 + side 2
8x^2 - 5x - 2 + 7x - x^2 + 3
so the answer is 7x^2 + 2x + 1

Part B
perimeter = a + b + c
4x^3- 3x^2 + 2x - 6 = 8x^2 - 5x - 2 + 7x - x^2 + 3 + c
4x^3 - 3x^2 + 2x - 6 = 7x^2 + 2x + 1 + c
4x^3 - 3x^2 - 7x^2 + 2x - 2x - 1 - 6
so the answer is 4x^3 - 10x^2 - 7

Answer 11

I still don't get part c

Answer 12

@jhonyy9

Answer 13

Can someone please help

Answer 14

i got it