Question

If $b^2<4ac$ then roots of equation $a{x}^4+b{x}^2+c=0$ are real and distinct if:

• A. $b<0$, $a<0$, $c>0$
• B. $b<0$, $a>0$, $c>0$
• C. $b>0$, $a>0$, $c>0$
• D. $b>0$, $a<0$, $c<0$

Answer 1

Answer: (B), (D)

The correct options are
B $b<0$, $a>0$, $c>0$
D $b>0$, $a<0$, $c<0$