Question

Determine as coordenadas do vertice da parabola da funçao y=-x2+6x+2

Answer 1

Resposta: Preste atenção na resolução, a=1, b =6 e c=2

$X_{v}=\frac{-b}{2a} \\X_{v}=\frac{-6}{2(-1)} \\\\X_{v}=\frac{-6}{-2} \\\\X_{v}=3\\Y_{v}=\frac{-(b^{2} -4ac)}{4a} \\\\Y_{v}=\frac{-(6^{2} -4.(-1).2)}{4.(-1)} \\\\\\Y_{v}=\frac{-(36+8)}{-4} \\\\\\Y_{v}=\frac{-(44)}{-4} \\\\\\Y_{v}=11$

Explicação passo-a-passo: