1. sqrt72
2. sqrt1/5
Thank you
2007-08-29 13:49:25 · 9 answers · asked by vadataborn 2 in Science & Mathematics ➔ Mathematics
1.
sqrt 72
= sqrt (36x2)
= (sqrt 36) x (sqrt 2)
= 6 x (sqrt 2) ... answer!
2.
sqrt 1/5
= (sqrt 1) / (sqrt 5)
= 1/(sqrt 5)
then multiply by ((sqrt 5) / (sqrt 5)) , since ((sqrt 5) / (sqrt 5)) = 1, right??? so,
(1/(sqrt 5)) x ((sqrt 5) / (sqrt 5))
= (sqrt 5) / ((sqrt 5) x (sqrt 5))
= (sqrt 5) / 5
so the answer is (sqrt 5)/5
FYI, that's the rational form of sqrt (1/5)
2007-08-29 14:12:25 · answer #1 · answered by Yusuf 4 · 0⤊ 0⤋
a million. Root 7 * Root 14 (a) cases 7 by utilising 14: = Root ninety 8 (b) Now think of of a sq. selection which works into ninety 8... The sq. selection 40 9 is going in 2 cases. (c) So root ninety 8 = root 40 9 * root 2 (d) Root 40 9 = 7, so the final answer is: 7 * root 2, it particularly is written as 7 root 2 2. 2 root 12 + 4 root 27 (a) root 12 = root 3 * root 4 and root 27 = root 3 * root 9 (b) So root 12 = 2 root 3 and root 27 = 3 root 3 (c) So 2 root 12 = 4 root 3 and four root 27 = 12 root 3 (d) 4 root 3 + 12 root 3 = sixteen root 3
2016-11-13 19:52:51 · answer #2 · answered by dagnone 4 · 0⤊ 0⤋
try finding factors which are themselves squares.
eg. 72 = 8 x 9, and 9 is a square, so
sqrt 72 = sqrt (9 * 8) = sqrt 9 * sqrt 8 = 3*sqrt(8)
but another (better) answer is 72 = 36 x 2 and 36 is a square,
so sqrt 72 = sqrt (36 * 2) = 6*sqrt(2)
Convention is that you don't have a radical in the denominator, so for your second one you can't "simplify" it as such, but you can multiply it by sqrt(5)/sqrt(5) to get the radical into the numerator, which gives
sqrt(5)/sqrt(5)*(1/sqrt(5)) = sqrt(5)/5
oh yeah, don't forget the +/- when you calculate the sqrt.
2007-08-29 13:58:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The answer to your first question is :
sqrt72= 6 * sqrt 2 =
8.4852813742386
The answer to your second question is:
sqrt 1/5 = 1/sqrt 5 = 0.4472135955
I hopes this helps.
2007-08-29 14:25:08 · answer #4 · answered by mcca5m 1 · 0⤊ 0⤋
1. √72= 3√8
2. √1/5=√1÷√5*√5=√1 * √5÷5 is √5/5=1
2007-08-29 13:57:56 · answer #5 · answered by Anonymous · 0⤊ 1⤋
1. sqrt(72)
=sqrt(36x2
=6x sqrt(2).
2.sqrt(1/5)
= sqrt (5x1/25)
=sqrt(5)/5. ANs
2007-08-29 14:02:18 · answer #6 · answered by Anonymous · 0⤊ 0⤋
sqrt(72) = sqrt(9)sqrt(8) = +/-3sqrt(4)sqrt(2) = +/-6 sqrt(2)
sqrt(1/5) = 1/sqrt(5) = sqrt(5)/5
2007-08-29 13:59:20 · answer #7 · answered by John V 6 · 0⤊ 0⤋
sqrt(72)= sqrt(36*2) = sqrt(36)*sqrt(2)=6*sqrt(2)
sqrt(1/5)=1/sqrt(5)
2007-08-29 14:00:43 · answer #8 · answered by nosf37 4 · 0⤊ 0⤋
8.485
.447
2007-08-29 13:59:05 · answer #9 · answered by 27ysq 4 · 0⤊ 1⤋