\(x^3+15x^2+75x+125\)
\(=x^3+3.x^2.5+3.x.25+125\)
\(=\left(x+5\right)^3\)
\(x^3+15x^2+75x+125\)
\(=x^3+3.x^2.5+3.x.5^2+5^3\)
\(=\left(x+5\right)^3\)
\(x^3+15x^2+75x+125\)
\(=x^3+3.x^2.5+3.x.5^2+5^3\)
\(=\left(x+5\right)^3\)
Chúc bạn học tốt nha!^^