Re: Can TI-85 calcs FOIL?


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Re: Can TI-85 calcs FOIL?



rhomard (rhomard@MCI2000.com) wrote:
: First off x^2 + 25 does not equal (x+5)(x-5).  :^)
: The 85 will not do this with a built-in routine.  I wrote a program for


        Yes it will...just use "POLY".  Enter the order of the polynomial
that you want to factor (i.e. 2 for x^2 - 25), and enter the coefficients
in the proper places (in this case a2=1, a1=0 and a0=-25).  Press F5 to
solve it, and it will give you the solutions for x.  In this example you'd
get x1=5, x2=-5.  Simple algebra tells you that this is (x-5)(x+5).
        It's in the manual.


Jacob Kirsch
jmkirsch@cs.buffalo.edu


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