ماهه = مشهدfind: a2 +1?_? – InterviewSolution

1.

ماهه = مشهدfind: a2 +1?_?

Answer»

a/b+ b/a=a+b; a+b= (a)^2+(b)^2=a+b/ab;;

(a+b)^2/ab=a^2+ b^2; a^2+ b^2+2ab/ab=a^2+b^2=a^2+b^2

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