Respuesta :

5x^2 - 6x^2 = - x^2 so its either c or d.

and + 9x - )-3x) = 9x + 3x = + 12x

so the answer s C.

noone48
5x2+9x+3
-6x2+3x
The answer is that you just solve it like this ==>-x2+12x+3
Finished!!
C is the answer!! ;)

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