1.A expressão 2xy - 3x - (2x - 3xy) equivale a:
a) - xy - 5x
b) - xy - x
c) 5xy - 5x
d) 5xy - x

2 . Ao dividir 2x² + 5x - 12 por x + 4 encontramos resto:
a) - 64
b) 0
c) + 40
d) - 24
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