+0  
 
0
85
1
avatar+128 

x is greater or equal to 0

y is greater or equal to 0

0 ≤ x+y ≤ 5

 

Determine the maximum value and minimum value of:  u = x^2 - xy + y^2

 Dec 28, 2018
 #1
avatar+99301 
+2

I've only estimated graphically

 

Looks like about 6.2

 

 Dec 29, 2018

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