2007-11-06 14:19:44 · 5 answers · asked by greenie23510 1 in Science & Mathematics ➔ Mathematics
This is pretty simple.
Since you're multiplying both square root denominators, it cancels. So your denominator is 5.
multiplying the numerators, you get 4.
so your answer is 4/5.
:D
2007-11-06 14:27:41 · answer #1 · answered by 11 4 · 0⤊ 0⤋
This can be thought of as a product of numerators (2 x -1 x -2) over a product of denominators (sqrt5 x sqrt5). The numerator product would be 4, and the denominator product would be 5, so the answer is 4/5.
2007-11-06 14:25:01 · answer #2 · answered by TitoBob 7 · 0⤊ 0⤋
Your numerator is: (2)(-1)(-2)=4
Your denominator is: (sqrt5)(sqrt5)=5
therefore, the answer is numerator/denominator=4/5
2007-11-06 15:10:26 · answer #3 · answered by vcs7578 5 · 0⤊ 0⤋
substitue x for the sgrt of 5
2(-1/x)(-2/x) multliply out.. (-2/x)(-2/x) becomes 4/x^2
resubstite for x soooo 4/(sqrt5)^2 do the simple math
4/5
2007-11-06 14:31:26 · answer #4 · answered by zootsuit68 2 · 0⤊ 0⤋
-1x-2=2
2x2=4
4/sqrt5
2007-11-06 14:24:27 · answer #5 · answered by c j 1 · 0⤊ 2⤋