Respuesta :

mistycoraleen

Answer:

5x^2+15x

Step-by-step explanation:

9578464

Answer:

0+0y+15x+5x^2

Step-by-step explanation:

first you have to combine like terms like -7+7 equals 0

then you do 10y-10y equals 0y

then your just left with 15x+5x^2 which you can add because they are not the same

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