Giải:
\(\left(x+3\right)^3-125=0\)
\(\Leftrightarrow\left(x+3\right)^3=125\)
\(\Leftrightarrow\left(x+3\right)^3=5^3\)
Vì \(3=3\)
Nên \(x+3=5\)
\(\Leftrightarrow x=5-3\)
\(\Leftrightarrow x=2\)
Vậy \(x=2\).
Chúc bạn học tốt!
\(\left(x+3\right)^3-125=0\)
=>\(\left(x+3\right)^3=125\)
=>\(\left(x+3\right)^3=5^3\)
=>\(x+3=5\)
=>\(x=2\)
Vậy....