The minimum value of the function $x ^ { 4 } - p ^ { 2 } x ^ { 2 }$ is - 9 $p$ is a real number.
Find the minimum value of the function $x ^ { 2 } - p x + 6$
A - 3
B $6 - \frac { 3 \sqrt { 2 } } { 2 }$
C $\frac { 3 } { 2 }$
D 3
E $\frac { 9 } { 2 }$
F $6 + \frac { 3 \sqrt { 2 } } { 2 }$