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Ciucciuwaa
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Problems with fsolve

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HP Prime
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Hi everyone,

i was trying to solve this formula but my calculator doesn't not work as always. It appears 'fsolve' and I don't know how to solve it. Can you help me and explain me what this 'fsolve' is?

 

ps: I had Hp prime app on my computer and it can solve the formula. The problem is just on my calculator.WhatsApp Image 2020-04-25 at 09.33.02.jpeg

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Joe_Horn
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CAS is optimized for EXACT math, but including decimal points always throws CAS into approximate mode.  So I suggest keying your input exactly, without using any decimal points.  This returns the exact solution, which you can easily approximate if you wish by pressing the [a b/c] key, as shown in the following screen capture.

 

solve

-Joe-
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Ciucciuwaa
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I recently have done the upgrade and before that, it never happend. I wrote the equation without any attention for decimals. there is a way to turn back at this way to write equations? 

thank you so much for your help, now I understand the problem! 

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