Đầu bài sai.
Sửa :
\(\left(7x-11\right)^3=10000\)
\(\Rightarrow\left(7x-11\right)^3=10^3\)
\(\Rightarrow7x-11=10\)
\(\Rightarrow7x=21\)
\(\Rightarrow x=3\)
(7x-11)3=32*25+100
\(\Leftrightarrow\)(7x-11)3 = 900
\(\Leftrightarrow\)7x-11 = \(\sqrt[3]{900}\)
\(\Leftrightarrow\)x = \(\frac{\sqrt[3]{900}+11}{7}\)