Prove
Prove that k1 and k2 is the equations of two circles. Find the equation of the line that passes through the centers of these circles.
k1: x2+y2+2x+4y+1=0
k2: x2+y2-8x+6y+9=0
Result
k1: x2+y2+2x+4y+1=0
k2: x2+y2-8x+6y+9=0
Result
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