AP and TS EAMCET Engineering Model Paper 6

Question : 65 of 160

Marks: +1, -0

x2+y2+21x+5=0 and x2+y2+21y+5=0 are two circles. 'P' is a point on the line x − y = 0. If PA, PB are the lengths of the tangents from P to the two circles and PA = 3 then PB =