Equação do 1º grau, não consigo resolver?

Resolva o parêntesis primeiro. (x^2 - 2x + 1) + 3x = 16 x^2 +x +1 -16 = 0 x^2 +x -15 = 0 delta = b^2 - 4ac = 1^2 - 4*1*(-15) = 1 +60 = 61 x= (-b +- raiz de delta) / (2a) = (-1 +- raiz de 61) / 2 A equação tem então duas raízes: x1 = (-1 + raiz de 61) / 2 x2 = (-1 - raiz de 61) / 2.

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