The equation \( \lambda x^{2}+4 x y+y^{2}+\lambda x+3 y+2=0 \) represents a parabola if \( \lamb... VIDEO
The equation \( \lambda x^{2}+4 x y+y^{2}+\lambda x+3 y+2=0 \) represents a parabola if \( \lambda \) is
(a) \( -4 \)
(b) 4
(c) 0
(d) none of these
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