Answer:
The correct option is B.
Step-by-step explanation:
The given expression is
[tex]\sqrt{x+2}\cdot \sqrt{x-2}[/tex]
According to the property of radical expression
[tex]\sqrt{a}\cdot \sqrt{b}=\sqrt{ab}[/tex]
Using this property,we get
[tex]\sqrt{(x+2)(x-2)}[/tex]
[tex]\sqrt{x^2-2^2}[/tex] [tex][\because a^2-b^2=(a-b)(a+b)][/tex]
[tex]\sqrt{x^2-4}[/tex]
Therefore the correct option is B.
