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OpenStudy (anonymous):
I WILL AWARD MEDALS.
The graph of which quadratic equation is shown below
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OpenStudy (aonz):
umm link not working
OpenStudy (anonymous):
Ok wait one second
OpenStudy (aonz):
for me anyways :(
OpenStudy (anonymous):
Here you go
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OpenStudy (aonz):
so what is the question lol?
OpenStudy (aonz):
so we need to find the equation O.o
OpenStudy (anonymous):
The graph of which quadratic equation is shown below?
y = x2 − 2x − 3
y = x2 + 2x − 3
y = −x2 + 2x − 3
y = −x2 − 2x − 3
OpenStudy (aonz):
it crosses at 1 and -3
OpenStudy (aonz):
at x
and at y it is -3
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OpenStudy (anonymous):
What does that mean
OpenStudy (aonz):
it is a smiley face parabola so it is either option 1 or 2
OpenStudy (aonz):
if it crosses at 1 and -3 the equation is
(x-1)(x+3) = 0
get it?
now expand this
OpenStudy (aonz):
expand y = (x-1)(x+3) and thats your answer
OpenStudy (anonymous):
So the positive ones
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OpenStudy (aonz):
well just expand this first
y = (x-1)(x+3)
OpenStudy (anonymous):
x^2+2x-3
OpenStudy (aonz):
yea!
OpenStudy (anonymous):
So b
OpenStudy (aonz):
yea
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OpenStudy (anonymous):
thank you
OpenStudy (aonz):
no problem!!
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