Simplify. (Sqrt 20) / 5 - 1 / (Sqrt 5)
2007-04-01 16:46:25 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
sqrt(20)/5 - 1/sqrt(5)
= 2*sqrt(5)/5 - sqrt(5)/5
= sqrt(5)/5
2007-04-01 16:49:31 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Posh. multiply the two terms by 1/sqrt(5) to get
sqrt 20/[5 sqrt 5] - 1/5. Now sqrt (20)= sqrt (5.4) or
2 sqrt(5)/[5 sqrt(5)] -1/5. Then we wind up with 2/5-2/5=1/5
2007-04-02 00:01:53 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋
sqrt(20)/sqrt(5)*4 = sqrt(4)/4 = 2/4 = 1/2 get it? you can divide the inside of a sqrt by the inside of another and the outsides by the outsides. same with multiplication
2007-04-01 23:54:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋
= sqrt(4)*sqrt(5) - sqrt(5)/(sqrt(5)*sqrt(5)
= 2sqrt(5)- sqrt(5)/5
=sqrt(5)* (2-1/5)
= 9/5sqrt(5)
2007-04-01 23:57:00 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
2*sqrt5/sqrt5*sqrt5-1/sqrt5
eliminate sqrt 5 from the first one .....so its .....2/sqrt5-1/sqrt5 ....then 2-1/sqrt5 is 1/sqrt 5
2007-04-01 23:53:16 · answer #5 · answered by ♥~~Hey~~♥ 3 · 0⤊ 0⤋