kayleetweedy1
28.09.2019 •
Mathematics
The temperature of a point $(x,y)$ in the plane is given by the expression $x^2 + y^2 - 4x + 2y$. what is the temperature of the coldest point in the plane?
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Ответ:
can be written as follows:
since and are always positive, except for x=2 and y=-1, when they become 0,
the minimum value of this expression is when x=2, and y=-1, that is -5
-5
Ответ: