Question

If x+y+=0
then Prove 23c2 y 2 23
IZ an
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Answer 1

Answer:

1. in an ordered field,one of the axioms is that for every x,

Step-by-step explanation:

1. x=0 and y=0;
2. x>0 and y<0;
3. x<0 and y>0;
4. x>0 and y>0;
5. x<0 and y<0;
6. in  case 1  we get xy=0 ,in case 2 and 3 we get xy<0  and in case 4 and 5 we get xy>0