Answer :
Given:
15x – 18y + 1 = 0 …… (i)
12x + 10y – 3 = 0 …… (ii)
6x + 66y – 11 = 0 …… (iii)
To prove:
Sets of given three lines are concurrent.
Explanation:
Now, consider the following determinant:
= 15(- 110 + 198) + 18(-132 + 18) + 1(792 – 60)
⇒ 1320 – 2052 + 732 = 0
Hence proved, the given lines are concurrent.
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