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Question

The distance from the point of intersection of the lines x2−y2−2x+2y=0 to the point of intersection of the lines 2x2−5xy+2y2+x+y−1=0 is

A
1
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B
0
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C
2
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D
4
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Solution

The correct option is B 0
To know the point of intersection in a pair of straight lines we need to partially differentiate once w. r. t. x and then once with respect to y and solve them to get the point. For first line,
1)2x2=0x=1
2)2y+2=0y=1
Point (1,1)
For second line
1)4x5y+1=0
2)5x+4y+1=0
On solving this, Point(1,1)
Hence they have the same point (1,1)
Hence distance =0

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