I am having trouble with math and not 100% confident on things. This question I've been having trouble with. I need to solve this equation using the quadratic formula and compute the discriminate first and separately.   2.12x2 -5.23x-4.27=0.

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ISBN:9780470458365
Author:Erwin Kreyszig
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I am having trouble with math and not 100% confident on things. This question I've been having trouble with. I need to solve this equation using the quadratic formula and compute the discriminate first and separately.   2.12x2 -5.23x-4.27=0. 

So far what I have is:

2.12x2 -x=4.27/-5.23 

2.12x-x= -0.81644359464627151051625239005736/2.12

x-x=-0.38511490313503373137559075002706

I feel like I am going down the wrong path but not sure. 

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