A.
-2x5 + 3x - 2:
This trinomial has three terms, with the highest degree term being -2x^5. It also has a constant term of -2. Therefore, it is a 5th degree trinomial with a constant term of -2.
B.
5x-2 +3x - 2:
This trinomial has three terms, but the exponent of x in the first term is -2, which is not a valid exponent for a polynomial term. Therefore, this trinomial is not a 5th degree trinomial.
C.
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