MCQ
If $\left(a^2+b^2\right) x^2+2(a c+b d) x+c^2+d^2=0$ has no real roots, then
- A$a d=b c$
- B$a b=c d$
- C$a c=b d$
- ✓$a d \neq b c$
✓
Answer
Correct option: D.
$a d \neq b c$
D
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