Mathematics, 10.03.2020 05:59 leelee85503

Please help! Will mark brainleist!

Below are two lengths of a triangle-
side one:-2x-1
side two: 9x+ -3
Perimeter: +-x-3
part a- What are the two sides of the triangle (show work).
Part b- What is the length of the third side (show work and reasoning).
part c- Do answers for a and b show the polynomials are closed under addition and subtraction?

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