Question

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


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 that helps let me know if it does

Answer 2

A is 5x² +7x -4.
B is 5x³ -x² -8x -7 Polynomials are always closed when its under addition or subtraction. Both part A and B are polynomials.