A) \[{{x}^{2}}-{{y}^{2}}=-4\]
B) \[{{x}^{2}}-{{y}^{2}}=4\]
C) \[(x+y-1)\,(x-y-4)=0\]
D) \[(x+y+1)(x-y+4)=0\]
Correct Answer: C
Solution :
The joint equation of the given lines is \[(x+y-1)(x-y-4)=0.\]
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