1) aplique a propriedade distributiva e agrupe os termos semelhantes
a) (x+2).(2x-5)
b) (x+3).(x-1)
c) (2x²-2).(x²+3)
a) (x+2).(2x-5)
b) (x+3).(x-1)
c) (2x²-2).(x²+3)
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a) (x+2).(2x-5) = 2x²-5x+4x-10 = 2x²-x-10
b) (x+3).(x-1) = x²-x+3x-3 = x²+2x-3
c) (2x²-2).(x²+3) = 2x⁴+6x²-2x²-6 = 2x⁴+4x²-6
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06/11/22