The equation aa? + 2hay+ by +c = 0, ab +0 represents a pair of real...

 

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The equation aa? + 2hay+ by² +c = 0, ab +0 represents a pair of real and parallel lines. If and only if (A) ab – h? = 0 and c<0 %3D (B) ab – h? = 0 and abc <0 (C) ab – h? = 0, ac <0 and be 0 %3D (D) ab – h? = 0, and c<0 The equation aa? + 2hay+ by² +c = 0, ab +0 represents a pair of real and parallel lines. If and only if (A) ab – h? = 0 and c<0 %3D (B) ab – h? = 0 and abc <0 (C) ab – h? = 0, ac <0 and be 0 %3D (D) ab – h? = 0, and c<0 The equation aa? + 2hay+ by² +c = 0, ab +0 represents a pair of real and parallel lines. If and only if (A) ab – h? = 0 and c<0 %3D (B) ab – h? = 0 and abc <0 (C) ab – h? = 0, ac <0 and be 0 %3D (D) ab – h? = 0, and c<0 The equation aa? + 2hay+ by² +c = 0, ab +0 represents a pair of real and parallel lines. If and only if (A) ab – h? = 0 and c<0 %3D (B) ab – h? = 0 and abc <0 (C) ab – h? = 0, ac <0 and be 0 %3D (D) ab – h? = 0, and c<0