Question

monte um gráfico da função quadrática g(x)=-x2+4x e responda as perguntas: quais são as raizes e o vértice da função ? determine, no mínimo, cinco pontos (pares ordenados) .

Answer 1

$Dados: g(x)=-x^{2} +4x\\\\a=1\\b=4\\c=0\\\\Agora\ iremos\ descobrir\ as\ raizes:\\\\\Delta =4^{2} -4.0.1\\\Delta=16-0\\\Delta=16\\\\\frac{-4 \frac{+}{-} \sqrt{16} }{2.(-1)} \\\\x'=\frac{-4+4}{-2} \\\\x'=0\\\\x"= \frac{-4-4}{-2}\\\\x"=4\\\\Agora\ iremos\ descobrir\ o\ x^{v}\ e\ o\ y^{v} :\\\\x^{v}=\frac{-4}{2.(-1)} \\\\x^{v}=2\\--------\\y^{v}=\frac{-16}{-4} \\\\y^{v}=4\\\\Portanto\ teremos\ os seguintes\ pontos:\\x'=0\\x"=4\\y^{v}= 4\\x^{v}=2\\ t^{i}\ ou\ termo\ idependente\ =0$