Wednesday, January 11, 2017

10.1#7 (First student question and answer of the semester!)


Dear Professor Taylor,

I was working on the webworks assigned  problems
and the answer wasn't correct (answer is below). I was hoping to see what
is wrong because I'm pretty sure the answer is correct.

(x-2)^2+(y-7)^2+(x-3)^2-62













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You were thinking the right thing, but you didn't write what you were thinking: the (x-3)^2 should be (z-3)^2.  (this is a innocent example of how mistakes are made, for example how little-bitty bugs get in software that cause million dollar software failures)

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