If \( a x^{2}+(b-c) x+a-b-c=0 \) has unequal real roots for all \( c \in R \), then
\( \mathrm{P... VIDEO
If \( a x^{2}+(b-c) x+a-b-c=0 \) has unequal real roots for all \( c \in R \), then
\( \mathrm{P} \)
(a) \( b0a \)
(b) \( a0b \)
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(c) \( ba0 \)
(d) \( ba0 \)
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