- #1
ehj
- 79
- 0
I have a problem which is best explained with an example:
sqrt(A)=B => A=B^2 <=> B=-sqrt(A) or B=sqrt(A)
Since A=B^2 <=> B=-sqrt(A) or B=sqrt(A) I should be able to reverse the order of this into
B=-sqrt(A) or B=sqrt(A) <=> A=B^2
But if this is done in the first equation you obviously run into a problem:
sqrt(A)=B => B=-sqrt(A) or B=sqrt(A)
What is it that I'm doing wrong, what wasn't allowed in above calculation?
sqrt(A)=B => A=B^2 <=> B=-sqrt(A) or B=sqrt(A)
Since A=B^2 <=> B=-sqrt(A) or B=sqrt(A) I should be able to reverse the order of this into
B=-sqrt(A) or B=sqrt(A) <=> A=B^2
But if this is done in the first equation you obviously run into a problem:
sqrt(A)=B => B=-sqrt(A) or B=sqrt(A)
What is it that I'm doing wrong, what wasn't allowed in above calculation?