Question

aratati. ca. urmatoarele. numere. 2la. puterea. 25. - 7 ori. 2. la. puterea 20. sunt. patrate. perfecte

Answer 1

[tex]2^{25}-7\cdot 2^{20}=2^{20}\cdot2^5-7\cdot 2^{20}=\\ =2^{20}(2^5-7)=2^{20}\cdot25=(2^{10})^2\cdot5^2=(2^{10}\cdot5)^2=\ \textgreater \ 2^{25}-7\cdot 2^{20}p.p.[/tex]