f(x)=x^2-2x-3

Question

f(x)=x^2-2x-3

anonymous · Answer

what is the question?

anonymous · Answer

this is a parabola that faces up
the zeros are -1 and 3 because 
$$x^2-2x-3=(x+1)(x-3)$$

anonymous · Answer

the vertex is 
$$(1,-4)
$$

anonymous · Answer

whats the x-intecept

anonymous · Answer

x - intercepts means where it crosses x - axis same as the zeros.  they are -1 and 3

anonymous · Answer

If  (x+1)(x-3) = 0 what must x be?

anonymous · Answer

grr.. too many answers, not enough questions satellite ;p

anonymous · Answer

on the x- axis, y = 0, so asking for the x - intercepts is a synonym for "set = 0 and solve"

anonymous · Answer

hello polpak

anonymous · Answer

what is with this 7C3 business?  is that the way it appears on a calculator?

anonymous · Answer

soo how to i type this answer in the computer to my answer key

anonymous · Answer

Yes. That's the calculator notation that they're introduced to when they start that section.

anonymous · Answer

can someone help me!!

anonymous · Answer

I think we did.. I have no idea how to put it into your class' answer key.

anonymous · Answer

like is is [-1,3) (-1,3)

anonymous · Answer

Oh. Well it's asking for the x intercept. So what is the x,y values of the two points?