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x^(2)+y^(2)-4x-4y+7=0 and x^(2)+y^(2)4x+...

`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`, then

A

`A = (0,0)`

B

`AB=AC`

C

`DeltaABC"can be equilateral"`

D

`DeltaABC "can not be equilateral"`

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
`O_(1)=(2,2),r_(1)=1`
`O_(2)=(-2,-2),r_(2)=1`
`impliesA=(0,0)`
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