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The number of common tangents to the circles x^2 + y^2 + 2x + 8y − 25 = 0 and x^2 + y^2 − 4x − 10y + 19 = 0 are :

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The number of common tangents to the circles x2 + y2 + 2x + 8y − 25 = 0 and x2 + y2 − 4x − 10y + 19 = 0 are : 

(a) 1 

(b) 2 

(c) 3 

(d) 4 

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1 Answer

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Best answer

Correct option (b) 2

Explanation:

The equation of circle is

∴ Circles do not touch each other. 

∴ No. of common tangents = 2.

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