If 2x2 + 3xy – cy2 = 0 represents a pair of perpendicular lines then c = …………………….
A. -2
B. \(\frac{1}{2}\)
C. – \(\frac{1}{2}\)
D. 2
Answer:D
If 2x2 + 3xy – cy2 = 0 represents a pair of perpendicular lines then c = …………………….
A. -2 B. \(\frac{1}{2}\) C. – \(\frac{1}{2}\) D. 2