TI-89, Quickly change the value of a variable?

Question

I have many ugly formulas that I have to add 2 to 8 times with a different value of x.
example (x^2)/4 + 456x^3 + (523/17)x^2 + 3x =932.1

I tried entering this:
(x^2)/4 + 456x^3 + (523/17)x^2 + 3x =932.1, x=4
(x^2)/4 + 456x^3 + (523/17)x^2 + 3x =932.1 x=7
(x^2)/4 + 456x^3 + (523/17)x^2 + 3x =932.1 x=9
etc.
etc.
but I get syntax errors

How do I do this with the ti-89 please?

Sounds good 037 G, but where how do i enter the arrow?

Answer 1

Your command line should look like this

2 → x:(x^2)/4 + 456x^3 + (523/17)x^2 + 3x
then hit enter to get:

64227/17

856809/68 for x=3

but if you have this equation equalling 932.1 then use the solve( , in the F2 menu to sove for x.

your command line should look like this:
solve((x^2)/4 + 456x^3 + (523/17)x^2 + 3x =932.1,x) and hit enter to get the value of x.

Answer 2

use second, 4 which will give you the :, and you have to use the store function to input values for x, the store button is above the on button
for xample:
2 (sto) x : 5-x

Answer 3

Write the function into a Y= function space and use the solve function on the graph. Solve for root.
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KrazyKyngeKorny(Krazy, not stupid)
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