1. Choose an appropriate method to represent the set clique which is composed of all the real roots of the equation x & # 178; - 2x-3 = 0. The answer is {3.0-1} why has 0? 2. There are 8 proper subsets of set {1,2,3}. Please list them! The second question is wrong, there should be 8, which 8? Not which 6!
In the first question, the answer should be {3, - 1}, no 0
I don't think there are eight of them in the second question
{1} , 2}, {3}, {1,2}, {1,3}, {2,3}, empty sets