Transcript

Ok, this video is on the Quadratic formula, lets get started. Again we press

second and then alpha to enter letters and then my menu. Code is I n d e x

and then alpha eight and then closed parenthesis, then press enter. From here

you – You can scroll up if you want to go to the bottom of the menu – they are

all alphabetical – the menu items. And there we have the quadratic formula

there. First of all, I give you a little information on what it is, and why we use it.

Then I give you the formula, which you write on your paper – the first thing you

do, and now we’re going to add a, b, c of the variables. So let’s do alpha minus

sixteen, press the enter twice, and then you have to go alpha maybe seven, and

then alpha let’s try three. Shows what you entered so you can change it if you

want. I say it’s ok. And then after that, if you want the quick answer you scroll

to this one or press the number in front, one or two, or step by step. Let’s do

the quick answer right now, I’ll press one, shows what you write on your paper

there as you’re adding the variables, and then this is the exact answer and this is

the approximate answer. Exact answer for x, a minus point two six six and point

seven o four. Press enter and you can go back to the main menu, or you can

quit, or you can do a new quad problem. Let’s do another, ahh, let’s go alpha

minus eight , and nine, and alpha two. Now you’ll notice this didn’t get nine so

we need to change it. So I’ll press number two and go back and enter it again.

Let’s go alpha minus eight, alpha nine, and alpha seven, that’s better, say it’s

ok. I want the step by step answer this time, so we go through it and you write

everything you see on your paper here. And you can see here is the exact again

and here is the approximate answer for one x, and here is – you are doing minus

or plus ya know on this part of the discriminate, and here is the exact answer or

the approximate answer. Pretty neat huh? Everystepcalculus.com. Enjoy my

programs.

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