Ilovemeowmeow
For y = x2 − 4x + 3,
Determine if the parabola opens up or down.
State if the vertex will be a maximum or minimum.
Find the vertex.
Find the x-intercepts.
Describe the graph of the equation.
PLEASE HELP! Need to finish this..
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JayDS
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where do you need help?
JayDS
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first of all the parabola definitely opens up indicated by x^2
JayDS
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because it is positive x^2 whereas if it was -x^2 then you would know it is an upside down parabola or opens down.
Ilovemeowmeow
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I need helping showing work for vertex and x intercept
JayDS
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ok, to find the vertex(turning point) simply we need to factorize the equation first.
JayDS
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do you know how to do that?
Ilovemeowmeow
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And if the vertex is max or min. And no I do not.
JayDS
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vertex is definitely a minimum because the graph is opening upwards.
JayDS
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|dw:1344039832324:dw|
JayDS
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that's an example
JayDS
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it's opening upwards so there's a minimum.
JayDS
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opposite applies so opening downwards, there is a maximum
Ilovemeowmeow
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okay.
godorovg
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guys you mind if I help here too?
Ilovemeowmeow
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The more the better!
godorovg
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look at the graph that has been drawn.
JayDS
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ok, I'll leave it to u @godorovg
godorovg
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no, I could use the help please stay
godorovg
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I can not draw like you
Ilovemeowmeow
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Please help me find the vertex and x intercept!
godorovg
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okay
godorovg
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first I am trying to help with this question only, what do you know about the vertex already?
Ilovemeowmeow
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nothing really.
godorovg
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that is alright, let's take this slow than.
godorovg
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one min
godorovg
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in order to what you are asking we must do something to complete square
godorovg
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let me ask have you ever done this before for finding the vertex?
Ilovemeowmeow
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nope
godorovg
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I am going to use a visual aide here to show you how this done, I went out on the web and found step by step how to do this.
godorovg
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please watch this you tub video here :
► 4:51► 4:51
www.youtube.com/watch?v=niHBt4rkavA
Ilovemeowmeow
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I got it, thank you!
godorovg
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no problem glad I could help out..