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tds1029
Sep 23, 2007, 12:20 PM
what is the distance between the lines if the equations of the 2 parallel lines are. Please show complete solutions.

L1: x-y+5=0
L2: x-y-3=0

galactus
Sep 23, 2007, 12:56 PM
Choose a point, (x_{0}, y_{0}), on one of the lines and use the formula for the distance between that point and the other line.

d=\frac{|Ax_{0}+By_{0}+C|}{\sqrt{A^{2}+B^{2}}}