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Mathematics

OpenStudy (anonymous):
f(x)=x^2-2x-3

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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

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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?

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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)

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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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