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Maths Exercices
Distance between two lines

If the two lines intersect, then it is clear that D = 0
If they do not intersect and are parallel, then D corresponds to the distance between a point from one of the two lines and the other line and is given by the formula that find the distance from a point to a line.

Find the distance between the lines r: -3x+4y+9=0 and s: -6x+8y-2=0

D =