larissahernandez5 larissahernandez5
  • 11-06-2020
  • Mathematics
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Which values for h and k the are used to write the function f(x) = x2 + 12x + 6 in vertex form?
h=6, k=36
h=-6, k=-36
h=6, k=30
h=-6, k=-30

Respuesta :

ranau1199
ranau1199 ranau1199
  • 11-06-2020

Answer:

h=-6 k=-30

Step-by-step explanation:

[tex]y=x^2+12x+6[/tex]

[tex]\mathrm{The\:vertex\:of\:an\:up-down\:facing\:parabola\:of\:the\:form}\:y=ax^2+bx+c\:\mathrm{is}\:x_v=-\frac{b}{2a}[/tex]

[tex]a=1,\:b=12,\:c=6[/tex]

[tex]x_v=-\frac{b}{2a}[/tex]

[tex]x_v=-\frac{12}{2\cdot \:1}\\[/tex]

[tex]x_v=-6\\[/tex]

[tex]\mathrm{Plug\:in}\:\:x_v=-6\:\mathrm{to\:find\:the}\:y_v\:\mathrm{value}[/tex]

[tex]y_v=\left(-6\right)^2+12\left(-6\right)+6\\y_v=-30\\\left(-6,\:-30\right)[/tex]

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