A) 75
B) 85
C) 91
D) 81
Correct Answer: D
Solution :
(d): We have, \[x+y-5=0\] \[\Rightarrow ~~~~x+y=5\] ...(i) And \[2x+y-9=0\] \[\Rightarrow ~~~~2x+y=9\] ....(ii) On solving equation (i) and (ii) we get \[x=4\] and \[y=1\] Now, \[4{{x}^{2}}+{{y}^{2}}+4xy=81\]You need to login to perform this action.
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