Se 1 e 3 são as raízes da função f(x) = x² + mx + n, então o valor de m+n é:
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Se 1 e 3 são as raízes da função f(x) = x² + mx + n, então o valor de m+n é:
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.