Question

 The circles x² + y² – 2x – 4y + 1 = 0 and x² + y² + 4x + 4y – 1 = 0 

(A) Touch internally 

(B) Touch externally 

(C) Have 3x + 4y – 1 = 0 as the common tangent at the point of contact. 

(D) have 3x + 4y + 1 = 0 as the common tangent at the point of contact.

Answer 1

Correct option (B, C) 

Explanation:

The two circle touch each other externally and common tangent is S₂ – S₁ = 0