a, Có: \(\left\{{}\begin{matrix}10^2+11^2+12^2=100+121+144=365\\13^2+14^2=169+196=365\end{matrix}\right.\)
\(\Rightarrow10^2+11^2+12^2=13^2+14^2\)
b, Có: \(\left(30+25\right)^2=55^2=3025\)
Vậy \(\left(30+25\right)^2=3025\)
c, Có: \(\left\{{}\begin{matrix}37\cdot\left(3+7\right)=37\cdot10=370\\3^3+7^3=27+343=370\end{matrix}\right.\)
\(\Rightarrow37\cdot\left(3+7\right)=3^3+7^3\)
d, \(\left\{{}\begin{matrix}48\cdot\left(4+8\right)=48\cdot12=576\\4^3+8^3=64+512=576\end{matrix}\right.\)
\(\Rightarrow48\cdot\left(4+8\right)=4^3+8^3\)