MCQ
Evaluate $\begin{bmatrix}\sqrt{3}&\sqrt{2}\\-1&2\sqrt{3}\end{bmatrix}$ is:
- A$6-3\sqrt{2}$
- B$6-\sqrt{2}$
- C$6+3\sqrt{2}$
- ✓$6+\sqrt{2}$
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$(A)$ $f(x)$ has three real roots if $a > 4$
$(B)$ $f(x)$ has only one real root if $a > 4$
$(C)$ $f(x)$ has three real roots if $a < -4$
$(D)$ $f ( x$ ) has three real roots if $-4 < a < 4$