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Can you check if this is right?

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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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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? 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.
Part A: To get the total length of the two sides you ahem to add them together: 3x^2 - 4x -1 -x^2+4x+5 -------------- 2x^2+4 Part B: To find the length of the third side of the triangle you will add the perimeter and the total length of the two sides together: 5x^3 - 2x^2 + 3x -8 -(2x^2 +4) ---------------------- 5x^3 - 4x^2 + 3x -12
idk what they're asking for in pt c?

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Other answers:

perimeter = side 1 + side 2 + side 3 so side 3 = perimeter - (side 1 + side 2)
lets first correct the answer of part B :)
To find the length of the third side of the triangle you will subtract the total length of the two sides from the perimeter
woat so part b is wrong?
yes, part B is wrong.
ok
the words in part B are incorrect, the answer is correct, because you indeed subtracted the answer from part A. just replace the description in your part B. ------ Part B: To find the length of the third side of the triangle you will subtract the total length of the two sides from the perimeter. 5x^3 - 2x^2 + 3x -8 -(2x^2 +4) ---------------------- 5x^3 - 4x^2 + 3x -12
ok
Part C: Polynomials are closed under addition if you get a polynomial by adding polynomials. Did you get a polynomial answer for part A? Polynomials are closed under subtraction if you get a polynomial by subtracting polynomials. Did you get a polynomial answer for part B?
yes and yes right?
good! since we get a polynomial after adding and subtracting polynomials, we can conclude, that the polynomials are closed under addition and subtraction.
thank you! may you check 2 more?

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