Respuesta:
b) -6m-8n+21n+9m-12
+3m+13n-12
C) 3x²-7y-4x+17y-3x²
10y-4x
d) 12m+12n-33n+21m²-34m-29=
-22m-21n-8m²
Ta-ta
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Respuesta:
b) -6m-8n+21n+9m-12
+3m+13n-12
C) 3x²-7y-4x+17y-3x²
10y-4x
d) 12m+12n-33n+21m²-34m-29=
-22m-21n-8m²
Ta-ta