Q.The number of common tangents to the circles $x^2 + y^2 = 4$ and $x^2 + y^2 - 8x + 12 = 0$ is

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Q.The number of common tangents to the circles x2+y2=4x^2 + y^2 = 4x2+y2=4 and x2+y2−8x+12=0x^2 + y^2 - 8x + 12 = 0x2+y2−8x+12=0 is