Question

The maximum possible value of $x^2+y^2-4x-6y$, where $x,y\in R$, subject to the condition $|x+y|+|x-y|=4$, is equal to

• A. 12
• B. 28
• C. 72
• D. does not exist

Answer 1

Answer: (B)

$E_{\max }(x=-2,y=-2)=28$