Tự chép đề bài nhé
=\(\frac{11.11.25.3.65.2.169}{3.13.2.30.11.18.11}\)
=\(\frac{25.65.13.13}{13.30.18}\)
=\(\frac{5.5.65.13.13}{13.6.5.18}\)
=\(\frac{5.65.13}{6.18}\)
=\(\frac{65.65}{108}\)
tự tính tiếp
\(\frac{121.75.130.169}{39.60.11.198} \)= \(\frac{11^2.5^2.3.13.5.2.13^2}{3.13.2^2.3.5.11.2.3^2}\)
= \(\frac{11.5^2.13^2}{2^2.3^3}\)