Quick little math puzzle

[albionmoonlight]

Using only two 2's and any combination of mathematical signs, symbols and functions can you make 5?

note--this is just a math problem; no language tricks or things of that nature.

[Easy Mac]

2+2=5

you didn't say the answer had to be correct

[Butter]

Ooops, it says only two 2's. Never mind.

[albionmoonlight]

You can only use two 2s.

[corbes]

that makes it harder.

[HornedFrog Purple]

2*2.5?

[RPI-Fan]

2.5 does not equal 2

[Passacaglia]

2+2+2/2=5

[albionmoonlight]

This is, I suppose, a hint, but one thing I want to clarify. In your answer, it is permissible to use the symbol - in front of a two to make it -2.

No other numbers are used. Only math symbols.

[Butter]

2 squared plus the square root of 2 is something like 5.41.

It's almost 5!

[Passacaglia]

Oh, *two* 2's! I see.

[Maple Leafs]

Could I use (22-2)/(2*2) ?

Edit: Nevermind. Two 2's only.

[fantastic flying froggies]

I give up.

[HornedFrog Purple]

grrrr

2^2 =4
2^(-2) = .25
.2^2= .004
.2^(-2)=25

[albionmoonlight]

HFP--

you are really close.

[AnalBumCover]

.2^(-2)=25
take the square root of that, and you get 5, right?

[VPI97]

sqrt(.2^(-2)) = 5

Good one.

Edit - Beaten.

[albionmoonlight]

ding ding

[HornedFrog Purple]

hahaha im an idiot! It was staring me right in the face!

[fantastic flying froggies]

even though technically, the square root is a ^1/2, so you are not using only two 2's

[Passacaglia]

I thought of a different one during my class: [(sqrt(22))]