ta có 303265^2=5^2 . 131^2 . 463^2(A)
30785^2=5^2. 47^2 . 131^2(B)
31047^2=3^2. 79^2. 131^2(C)
=>A+B+C=131^2.(5^2.463^2+5^2.47^2+3^2.79^2)=131^2 .5470619
TA CÓ 5470619=7.11,23.3089 VẬY UNTLN là 3089
Nè bạn
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