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. As we go through trig and half angle sine integrating sine derivatives 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 alpha 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? everystepcalculus.com. Go to my site buy my programs and pass calculus.