After working with the "split the middle term" scheme for factoring trinomials of the form

Naturally, one could enter the program into a calculator. However, the file for the program in is available at trifact1.83p. Depending upon your browser, you should be able to save the file to your disk and then transfer it via TIGraphlink, assuming you have the program and the required cable.
We conclude this page with few sample runs of the program:
 We open the PRGM menu by pressing the key and then moving, if need be, to find the TRIFACT1 program. The calculator used to generate Figure 1 has this program in position 9 of the list. Having highlighted the TRIFACT1 program, we can press the key to move to Figure 2. 
 All that has been accomplished is to paste the command prgmTRIFACT1 onto the screen. We will have to press the Having highlighted the TRIFACT1 program, we can press the key to actually start to run the program. 
 In Figure 3 the program has started. It has cleared the display and
written the heading,

 Not only did we supply the value 1 for A,
Figure 4 shows that we have entered the value 11 for B and the value 24 for C.
These are the coefficients for

 Figure 5 shows the answer produced by the program. The
template 
 The program was completed in Figure 5. To restart it, we press
.
Figure 6 gives the data entry for the problem

 Figure 7 shows the result, after entering the value for C and pressing
. From these values we obtain a factoring of

 Figure 8 gives the data entry for the problem

 Figure 9 shows the result, after entering the value for C and pressing
. From these values we obtain a factoring of

 Figure 10 gives the data entry for the problem

 The program TRIFACT1 can not factor this trinomial using just integers. The message to that effect is displayed on the screen seen in Figure 11. 
 Figure 12 gives the data entry for the problem

 Figure 13 shows the result, after entering the value for C and pressing
. From these values we obtain a factoring of

 Figure 14 gives the data entry for the problem

 Figure 15 shows the result, after entering the value for C and pressing
. From these values we obtain a factoring of

 Figure 16 gives the data entry for the problem

 Figure 17 shows the result, after entering the value for C and pressing
. From these values we obtain a factoring of

The TRIFACT1 program, given and illustrated above, produces output that asks the user to associate the numeric answers with the coefficients of a standard answer
PRECALCULUS: College Algebra and Trigonometry
© 2000 Dennis Bila, James Egan, Roger Palay