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have to put it was 2x and not x2

--back to the problem--

2x-x-4=0

x=4

* * * * *

True, but the question, in all likelihood WAS x2 - x - 4 = 0

and the solutions to that equation are -1.561553 and 2.561553

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Q: What is the solution of x2-x-4 equals 0?
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