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Simplifique as expressões a(5a-1)+(a+2)² (y-3)(y+2)-(y+1)² (2a+3b)²-4a(a+3b)
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Determine o valor de:(necessário apresentar cálculos) a) √36 . √25.9 b) √5².25² c) √100 - √100/100
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