Respuesta :

[tex]\bf \begin{array}{llccll} y=&1x^2&-6x&+9\\ &\uparrow &\uparrow &\uparrow \\ &a&b&c \end{array}\qquad discriminant\implies b^2-4ac[/tex]

so... what does that give you for the discriminant?

if it's a negative value, no solutions
if it's a positive value, two solutions
if it's 0, one solution

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