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I want to insert say "x^2 + 2x", and then I want a way to simply change the value of x (x=3, x=-1, etc) and get the result. How can I achieve this?

 

I'm trying these ways but they don't work:

https://imgur.com/a/KnZS0yB

 Oct 1, 2019
 #1
avatar+104962 
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x^2 + 2x  , x  = 3

 

(3)^2  + 2(3)  =

 

9 + 6  =

 

15

 

cool cool cool

 Oct 1, 2019

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