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Zardoky

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Calcule : a) (-2x) · (5x) =b) 3 · (-5x) =c) (-5ad) · (+4d) =d) (-7a²) · (-3ad²) =e) (-7x²) · (-2xy²) · (-xy)
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Simplifique as expressoes algebricas a) (-2a²b) · (5ab²) + 8a³b³ =b)-2x · (3x²) + 9x³ =c) (-5ab²)³ + 2a · (a²) =d) 10 - 2x² · (-3x²)² - 2x³ · (-3x³) =
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