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Using determinants, find the equation of the line joining the points (i) (1, 2) and (3, 6) (ii) (3, 1) and (9, 3)

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(i) माना कोई बिन्दु `(x, y)` है।
इसलिए त्रिभुज के शीर्ष `(x, y),(1,2),(3,6)` होंगे।
`\therefore \Delta` का क्षेत्रफल `=\frac{1}{2} [[x_1,y_1,1],[ x_2,y_2,1],[ x_3,y_3,1]]`
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