$ax^{2}+2hxy+by^{2}+2gx+2fy+c=0$ represents a pair of straight lines if

E

Editor

Sep 18, 2022

$ax^{2}+2hxy+by^{2}+2gx+2fy+c=0$ represents a pair of straight lines if

Difficulty: Easy

A:

$a+b=0$

B:

$ab=0$

C:

h^{2}-ab=0

D:

All of these

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ID: 63273db9ca83163ac3a11367