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# Evaluate a Radical Expression by Substituting -2

ALGEBR-KBNZLW

Evaluate the radical expression if $x=-2$:

$$\sqrt{4^2-2x-x^2}$$

If there is no real number, state so.

A

$2\sqrt{6}$

B

$2\sqrt{2}$

C

$4$

D

Not a real number