Section (D) : Position of two circle, Or...

Section (D) : Position of two circle, Orthogonality, RadicalB-1. Find the equations to the common tangents of the circles x + y - 2X -6ytandx + y + 6x - 2y + 1 = 0u fit-12=0 and x + y + 6x + 4y -6 = 0 cut each other orthogon:

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`3x-7y^2+3xyz=3(2)-7(-4)^2+3(2)(-4)(1)`
`=6-7xx16-6xx4`
`=6-112-24`
`=6-136`
`=130`

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