Posted by Modulus Function on Saturday, March 30, 2013 at 11:01am.
Sketch y=(x1)(x3) and y=x^24x .
I don't know how to sketch the graphs :(

math  Reiny, Saturday, March 30, 2013 at 11:32am
in your previous post I showed you how to graph the absolute value of linear function.
The same concept is true for the above quadratics
for y=(x1)(x3)
You will have two parabolas, one is
y = (x1)(x3) the other is y = (x1)(x3)
one will open up , the other will open down
They both have the same xintercepts of 1 and 3
So sketch both of them, then erase the part of both of them that lies below the xaxis.
Do the same for the second equation.
They will have similar shapes, except the second has xintercepts of 2 and 2

math  Anonymous, Saturday, March 30, 2013 at 11:50am
i still don't really understand. How can i sketch y=(x1)(x3) and y=(x1)(x3) ? what is the coordinate?
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