null is the concept of "nothing", or the empty set. It is similar to zero but has some differences Lets say you have a bunch of oranges and a bunch of apples in a bucket, and I ask you to pull out of the bucket all things that are bannanas. What you would give me would be an empty set. If you were to count everything in that set you would get 0. null can also have specific meanings in programming, usually with regards to memory allocation and string manipulation
Besides the fact the x is not a multiplier in algebra or above (this is flawed algebra), the problem does not add up. B = 2 -a=b 2 = 2 T -axa=axb 2 . 2 = 2 . 2 T -axa-bxb=axb-bxb 4-4= 4-4 0 = 0 T -(a+b)x(a-b)=bx(a-b) 4 . 0 = 4(0) 0 = 0 T -(a+b)=b 4 = 2 F a+a=a 4 = 2 F 2xa=a 4 = 2 F 2=1 !!! F The math has nothing do do with your problem, and some of it isnt even true.
You mean that "x" is no longer an accepted algerbraic multiplication symbol? Hmm..it seems to be in a lot of elementry math books ;-)
Its been a long time since highschool for me, but one of the things I do remember is that the got rid of the x because x is a variable. For example 2x is 2 times x 5(x+1) is five times (x plus one) They are next to each other if they are variables or numbers, if there are two numbers together they use a . like symbol. You will find X as a multiplier in any grade school math book however. I demonstrated how the equations math is flawed, it would not work with any number, the simple logic of it is not correct math. Unless its zero, a+a can not equal a.
It isn't . He has assumed it to be , and is perfectly within his rights to do so. Although the moment he divides by zero, his whole puzzle goes for a toss.