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
