(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Recently got a ti-89 and when I use it to derive for example d(x^2+4x-10, x)

I get a decimal, 5.27 instead of getting 2x+4.

3. The attempt at a solution

I tried changing the mode to exact, approx, and auto. All give the same answer.

I tried pressing the diamond button before ENTER, only in the exact mode it gave me a fraction.

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# Calculators Ti-89 exact/approx

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