rubidium
?-X is 2 + 2.
1/2, 1/3, 2/3 are some.
2, 3.67, -4.585858.. (repeating) are some examples.
1/2 or 2/3 3/4
2+2=4 or 2x6= 12
2 examples for this questions are Glass and Steal
2 46 793
answers.com is dumb
2 and 3
some examples of non- negative numbers are = 2 ,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40........ and so on till the nth number
I am a kid, so I might not nail it, but some examples are the dragon curve and julia set.
invasion 1 2 and 3 ADUH