circle

Question: The equation of the circle which intersects circles ${{x}^{2}}+{{y}^{2}}+x+2y+3=0$ ,${{x}^{2}}+{{y}^{2}}+2x+4y+5=0$ and ${{x}^{2}}+{{y}^{2}}-7x-8y-9=0$ at right angle, will be



1) ${{x}^{2}}+{{y}^{2}}-4x-4y-3=0$
2) $3({{x}^{2}}+{{y}^{2}})+4x-4y-3=0$
3) ${{x}^{2}}+{{y}^{2}}+4x+4y-3=0$
4) $3({{x}^{2}}+{{y}^{2}})+4(x+y)-3=0$
Solution: Explanation: No Explanation
System of circles

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