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What is the sum of all possible values of x such that 2x(x-10)=-50+x^2-30x?

 Oct 16, 2022
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the sum of all possible values of x

 

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\(2x(x-10)=-50+x^2-30x\\ 2x^2-20x+50-x^2+30x=0\\ x^2+10x+50=0\\ \color{blue}x\in \{-5-5i,-5+5i\}\)

 

The sum of all possible values of x is  -10 .

laugh  !

 Oct 17, 2022

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