e) Ta có : \(x^3+9x^2+27x+27=x^3+3.3.x^2+3.3^2.x+3^3=\left(x+3\right)^3\)
g) Ta có : \(x^3+8y^3=x^3+\left(2y\right)^3=\left(x+2y\right)\left(x^2+2xy+4y^2\right)\)
e,Ta có:\(27+27x+9x^2+x^3 =\left(x+3\right)^3\)
g,\(x^3+8y^3 =x^3+\left(2y\right)^3=\left(x+2y\right)\left(x^2+2xy+4y^2\right)\)