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Questions  

The centre of the circle inscribed in the square 

formed by the lines x28x+12=0 and y214y+45=0, is 

a
(4, 7)
b
(7, 4)
c
(9, 4)
d
(4, 9)

detailed solution

Correct option is A

The equations of the sides of the square x=2,x=6,y=5 and y=9.Therefore, the coordinates of end points of a diameter are (2, 5) and (6, 9). So, the centre ofsquare has the coordinates 2+62,5+92=(4, 7)Hence, the coordinates of the centre of the circle are ( 4, 7).

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