The joint equation of the straight lines \[x+y=1\]and \[x-y=4\]is [Karnataka CET 1993]

The joint equation of the straight lines \[x+y=1\]and \[x-y=4\]is

1.	The joint equation of the straight lines \[x+y=1\]and \[x-y=4\]is [Karnataka CET 1993]
A.	\[{{x}^{2}}-{{y}^{2}}=-4\]
B.	\[{{x}^{2}}-{{y}^{2}}=4\]
C.	\[(x+y-1)\,(x-y-4)=0\]
D.	\[(x+y+1)(x-y+4)=0\]
Answer» D. \[(x+y+1)(x-y+4)=0\]

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The joint equation of the straight lines \[x+y=1\]and \[x-y=4\]is [Karnataka CET 1993]

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