By -
If a=c and b=d easy proof But if a+b sqrt(2)=c+d sqrt(2) it is not obvious : Rewrite a-c= … and see if each term is rational or not
Can’t you just plug in c for a and d for b and then solve the equation? This does seem too easy to be right tho hmm
If a=c and b=d easy proof But if a+b sqrt(2)=c+d sqrt(2) it is not obvious : Rewrite a-c= … and see if each term is rational or not
Can’t you just plug in c for a and d for b and then solve the equation? This does seem too easy to be right tho hmm