Q60. The lines represented by ax2 + 2hxy + by2 = 0 are orthogonal if:Mathematics — Analytic Geometry — Question 60 of 217A. a - b = 0B. h2 - ab = 0C. a + b = 0D. a = -1Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →