I got to (√4√5)/(5)-1/√5 but not sure where to go from here?
2007-03-18 06:23:40 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
first step would be to simpliry 1/sqrt(5). multiply numberator and denominator by sqrt(5)
thus you get sqrt(20)/5 - sqrt(5)/5
(sqrt(20) - sqrt(5)) /5
sqrt(20 = sqrt(4)*sqrt(5) = 2*sqrt(5)
thus we get (2*sqrt(5) - sqrt(5)) /5.
which becomes sqrt(5)/5
2007-03-18 06:34:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1/√5 *(√5/√5)=√5/5
((2√5)/5) -(√5/5)= (2√5-√5)/5
=√5/5
2007-03-18 06:31:56 · answer #2 · answered by Maths Rocks 4 · 0⤊ 0⤋
1/√5 or √5 / 5
Doug
2007-03-18 06:29:50 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋
√4=2
so you have:
2√5/5 -1/√5
To rationalise the denominator multiply by √5/√5 =1
1/√5 *√5/√5 = √5/5
so 2√5/5 -√5/5 = (2√5-√5)/5
so it simplifies down to
(√5)/5
2007-03-18 06:35:43 · answer #4 · answered by emily 2 · 0⤊ 0⤋
ok √20 = 2√5 cause √4 is 2.
so its now
2√5 - 1
------ -------
5 √5
hmmm.... im gonna need to think this over, ill edit when it comes to me
2007-03-18 06:38:14 · answer #5 · answered by Ross 3 · 0⤊ 0⤋
sqrt 5 / 5
2007-03-18 06:32:42 · answer #6 · answered by dukebdx12 3 · 0⤊ 0⤋
square of 4 times square of 5 equals 2 square of 5 all over 5 it makes 2/5 square root of 5. minus 1 square root of 5 equals 3/5 square root of 5. that is the answer.
2007-03-18 06:32:34 · answer #7 · answered by tyroneskee 2 · 0⤊ 2⤋