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I'm going to use the calculator here for some quadratic formula examples
and let's get started you have to press second alpha
to put the i n d e x letters in here to get to my menu
and then press alpha to put the eight and the open and closed
parenthesis and then press enter
and you're into my menu uhm as we go through trig
and half angle sine integrating sine
derivatives uhm relative extrema
is a graphing by hand but we want quadratic formula
right now I give you a little demonstration
of what it does in words of course
you write this formula down on your paper I'm going to do two examples
two quadratic formula examples you have to press alpha
before you put anything in the entry lines here
we're going to press alpha minus eight alplha nine
and alpha seven and I'm going to say it's ok
I give you a chance to change it always in my programs
but I say it's ok and we're going to do the step by step
answer right now and you mark all of this on your paper
if you have to do it step by step here's the equation
just like you would if you were doing it by hand
and here's the answer the exact answer is here
and the approximate answer is here exact and approximate
and we're going to go put a couple of other variables in
alpha minus sixteen alpha seven
and alpha nine press ok
we're going to do the quick answer here's the variables put into this formula
and the exact answer and approximate
exact and approximate turns out to be one in this case so
pretty neat huh every step calculus dot come
go to my site buy my programs
and pass calculus