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Mathematics
OpenStudy (anonymous):

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

OpenStudy (anonymous):

what is the question?

OpenStudy (anonymous):

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

OpenStudy (anonymous):

the vertex is \[(1,-4) \]

OpenStudy (anonymous):

whats the x-intecept

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

hello polpak

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

can someone help me!!

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

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