Find 2 numbers a and b such that (a-b)^2 < (a+b)(a-b)< (a+b)^2 find two numbes a and b such that this is not true

Suppose for the moment that the inequality holds for all :

Expanding everything gives

In particular, the inequality says that for any choice of . But if and , then while .

So one possible choice of could be and . Then we get

but clearly it's not true that .

the correct answer is 1.7

a. positive: 2 or 0; negative : 2 or 0; complex: 4or2or0