∣∣xa1a2yb1b2111∣∣=0
x∣∣b1b211∣∣−y∣∣a1a211∣∣+1∣∣a1a2b1b2∣∣=0
x(b1−b2)−y(a1−a2)+a1b2−a2b1=0The equation of the line passing through the distinct points (a1,b1) and (a2,b2) in slope-intercept form
y=a1−a2b1−b2x+a1−a2a1b2−a2b1,a1=a2
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