I am going to solve a quadratic equation now
using the TI-36X Pro calculator.
The first thing I am going to do is make sure
my equation is in standard form.
Do I have Ax squared plus Bx plus C and is
it set equal to zero?
This equation is.
So from there I want to identify what A, B,
and C is.
A is equal to 2, B is equal to -6, and C is
equal to positive 4.
So I have my A, B, and C set.
Now I am going to start with my calculator.
The first thing I need to do is turn it ON,
so I'll turn on the calculator there, and
I can see that it is come on.
The next thing I want to do is make sure I
clear out my variables in case somebody else
has used this calculator before or in case
I didn't clear out the variables from the
last time I did it.
So, in order to do that, I am going to hit
the 2nd key right up there, and then I am
going to hit this button here that says Clear
variables like that.
So I hit clear variables and it says Clear
Var, YES, and then I am going to hit the ENTER
key down here in the corner.
So I hit the enter key, and it has now cleared
out the variables.
So now I am ready to go into my polynomial
solver mode.
In order to do that, I am going to hit the
2nd key again, right up here at the top of
the corner and the screen says "2nd" , as
you know, and then I am going to hit this
key right here, this key is 2 above the 8
- poly solver - so I hit that key - and it
takes me to my polynomial solver mode.
I am going to use choice "1" which is a quadratic
equation, the ax^2 plus bx plus c = 0, so
then I am going to hit the enter key down
here in the corner.
When I hit the enter key, it asks me for what
"a" is.
A is equal to 2, so I am going put the 2 in,
press 2, and then I am going hit enter.
It automatically takes me to B. Now B is equal
to negative 6.
It's important that you don't hit the minus
key over here, but instead hit the negative
key down here.
So I am going to put negative then I hit 6.
Then again I am going to hit ENTER.
From there it asks me for C. C is 4.
So I am going to put 4 in and hit enter.
Then it highlights the SOLVE.
So now the equation is ready to solve.
So I am going to hit enter now.
You will notice it says you are doing an equation
in standard form, ax squared plus bx plus
c equals zero. and it tells me my first answer
is equal to 1.
So I am going to come over here to my paper
and am going to right x1 is equal to 1.
So x1 is equal to 1.
And then, I am going to go over here and hit
the down arrow, and the down arrow gives me
my second answer.
And x2 is equal to 2.
So I am going to come over and put x2 is equal
to 2.
Those give the 2 answers to my quadratic equation.
So the answers to that quadratic equation
2x squared minus 6x plus 4 equals zero are
x equals 1 or x can equal 2.
And that is how we use the TI-36X Pro to get
a solutions to a quadratic equation.
