mellamokb
Joined: 10 May 2007
Posts: 124
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 Posted: October 22, 2007 10:37 AM Post subject: |
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Hi blcArmadillo,
Welcome to TI-89 Forums!
The TI-89 has a function called "part(" that allows you to select parts of an expression. The "part(" function takes two parameters: the expression, and which part. You can indicate which part by using the numbers 0, 1, or 2, where 0 represents the operator ("+", "-", "or", etc.) and 1, 2 represent the operands. For example:
| Code: |
part(j=5k+3,0)
"="
part(j=5k+3,1)
j
part(j=5k+3,2)
5k+3
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So in your case, you could use part(x=8 or x=-6, 1) to get the left solution (x= , and part(x=8 or x=-6, 2) to get the right solution (x=-6). Then you could apply the part function again to get the right sides of the two expressions "x=8" and "x=-6":
| Code: |
solve((x+6)*(x-8)=0,x)
x=8 or x=-6
part(ans(1), 1)
x=8
part(ans(1), 2)
8
part(ans(3), 2)
x=-6
part(ans(1),2)
-6
ans(1)+3
-9
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Just experiment with the "part(" function, as it is a very powerful function capable of decomposing any expression in the calculator.
Hope this helps!
~ mellamokb |
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