1.

`x^(2)+y^(2)-4x-4y+7=0` and `x^(2)+y^(2)4x+4y+7=0` are equation of excircle opposite to B and C respectively in a `DeltaABC`, thenA. `A = (0,0)`B. `AB=AC`C. `DeltaABC"can be equilateral"`D. `DeltaABC "can not be equilateral"`

Answer» Correct Answer - A::B::D
`O_(1)=(2,2),r_(1)=1`
`O_(2)=(-2,-2),r_(2)=1`
`impliesA=(0,0)`


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