1) Efetue as adições & Subtrações
a) (9x²-4x-3) + (3x²-10) =
b) (7x-4y +2)-(2x-2y +5)=
c) (x²-5x+3) - (4x²+6)=
d) (5x²-2ax + a²) + (-3x² + 2ax - a²)=



2) Calcule a divisão:
(-100 a³): (-25a²)​
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