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What is the axis of symmetry and vertex for the graph #y=x^2-7x+12#?

1 Answer

Mar 28, 2016

See explanantion

Explanation:

#color(brown)("Axis of symmetry is also "x_("vertex"))#

#color(blue)(x_("vertex")=(-1/2)xx(-7) = +7/2)#

Important point about x vertex

#y=ax^2+bx+c" " ->" " y=a(x^2+b/ax)+c#

#x_("vertex")= (-1/2)xx(b/a)# In your case #a=1#

#y_("vertex")# can now be found by substitution. I will let you do that.

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