Quote:
Originally Posted by Chaotix
also, since, A = B, then A - B = 0, therefore instead of simplifying into A + B = B, it simplifies into 0 = 0
this is an example of X = R, which stand for "x is an element of all real numbers"
it means in the equation of A = B, no matter what numbers u plug in as A or B, it would always come out as 1 = 1, 2 = 2, etc...
i learned this in my algebra-II class.... yesterday....
|
Yeah pretty much except it's not the same as when x= all reals (not R, fancy R). x= all reals (AR) is a domain of an equation which is only the case when all the denominators cannot be equal to 0, all the logs and sqr roots are already greater than or equal to 0 (that is, they don't contain an x variable). You'll learn about it more in algebra 2.