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Q.
Let P(x
1
,y
1
) and Q(x
2
,y
2
) are two points such that their abscissa x
1
and x
2
are the roots of the equation x
2
+2x-3=0 while the ordinates y
1
and y
2
are the roots of the equation y
2
+4y-12=0 . The centre of the circle with PQ as diameter is
A.
(-1,-2)
B.
(1,2)
C.
(-1,2)
D.
(1,-2)
E.
None of the above
View Answer
Correct choice: A
Explanation:
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