#### Question

If an equation hxy + gx + fy + c = 0 represents a pair of lines, then.........................

(a) fg = ch (b) gh = cf

(c) Jh = cg (d) hf= - eg

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Solution for question: If an equation hxy + gx + fy + c = 0 represents a pair of lines, then concept: Pair of Straight Lines - Condition for Parallel Lines. For the courses HSC Arts, HSC Science (Computer Science), HSC Science (Electronics), HSC Science (General)