If $$m^2 = 17$$, then what is the value of $$(m+1)(m-1)$$?

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If $$m^2 = 17$$, then what is the value of $$(m+1)(m-1)$$?

A、$$\sqrt{17}-1$$
B、$$\sqrt{17}+1$$
C、16
D、18
E、288

答案：C

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