Rationalize the denominator:
√5 / (√5 + 2)

[2 is not part of the square root of 5]

Question

Rationalize the denominator:
√5 / (√5 + 2)

[2 is not part of the square root of 5]

anonymous · Answer

multiply both sides by $$\sqrt{5} - 2$$

anonymous · Answer

rachel is right, multiply by the reciprocal

666potatoes · Answer

Would it leave me with √25 - 2 ?

666potatoes · Answer

Or √25 - 2 / √25 - 4 ?

anonymous · Answer

the radicals cancel

666potatoes · Answer

Ah that's what I thought. So it is just √25 - 2 ? so it would be 3?

anonymous · Answer

$$25-2\sqrt{5}$$

anonymous · Answer

(You had to multiply root 5 by -2)

anonymous · Answer

how do you get 25-2root5...i got 5-2root5..

666potatoes · Answer

Zomg, a dispute.

666potatoes · Answer

I don't think the radicals cancel out when multiplying √5 by √5 in the numerator. :l

666potatoes · Answer

But then that means the denominator radicals wouldn't cancel out so weogheoiwghoiew.

anonymous · Answer

They do! if you multiply the same radicals together they drop the radical sign

666potatoes · Answer

Alright, I'm going with Rachel's answer. Haha.

anonymous · Answer

i agree with rachel, i just get the 25...cuz in the numerator i was getting root 5 times root5 -2. root 5 times root 5 =5 not 25

anonymous · Answer

just not*

anonymous · Answer

Oh right. sorry i messed up.

anonymous · Answer

haha its cool..i wrote that at first too

anonymous · Answer

all rightie! good luck with math, and finals if you have them!

666potatoes · Answer

So the correct answer is 5-2√5. Right?

anonymous · Answer

Yep!

666potatoes · Answer

Ty gaiz. c: