Q: The equation ax² + 2hxy + by² = 0 will represent a pair of perpendicular lines, then समीकरण ax² + 2hxy + by² = 0 दो लम्बवत रेखा युग्म को प्रदर्शित करेगा–
A.
ab = 0
B.
ab – h² = 0
C.
a + b = 0
D.
a – b = 0
Correct Answer:
Option C -
Explanations:
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