Question

PLEASE PLEASE PLEASE PLEASE PLESE HELP ME???/!?!?!?!!? I'LL GIVE BRAINLY, POINTS, MEDAL, THNAKS


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?
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

The correct answer for part A is 5x² +7x -4. 5x³ -x² -8x -7 is the right answer for part B. Polynomials are always closed if under addition or subtraction. The answers of both parts A and B are polynomials.

Hope this helps!

~LENA~

Answer 2

• The correct answer for part A is 5x² +7x -4.
• 5x³ -x² -8x -7 is the right answer for part B.
• Polynomials are always closed if under addition or subtraction.
• The answers of both parts A and B are polynomials.

We have given that the lengths of two sides of a triangle are shown below:

Side 1: $3x^2 -2x - 1$

Side 2: $9x + 2x^2 - 3$

Also, the perimeter of a rectangle is 5x^3 + 4x^2 -x -3.

What is the total length of sides 1 and side 2

We add the sides one and side two to get the total length of the sides.

For part A:

Therefore we get the total length is

$5x^2+7x -4.$

What is the perimeter of a rectangle?

The perimeter of the rectangle =2(l+W)

For part B):

5x^3 + 4x^2 -x -3=2(5x^2+7x -4+w)

$W=5x^3 -x^2-8x -7$

Therefore from part A and part B we can say that

Polynomials are always closed if under addition or subtraction.

The answers of both parts A and B are polynomials.

To learn more about the polynomial visit:

https://brainly.com/question/2833285