\(54x^3+16y^3=2\left(27x^3+8y^3\right)=2\left(3x+2y\right)\left(9x^2-6xy+4y^2\right)\)
\(c,54x^3+16y^3=2.\left(27x^3+8y^3\right)=2\left(3x+2y\right)\left(9x^2-6xy+4y^2\right)\)
\(d,x^4-16y^4=\left(x^2\right)^2-\left(4y^2\right)^2=\left(x^2-4y^2\right)\)
a,\(54x^3+16y^3=2.\left(27x^3\right)+2.\left(8y^3\right)\)
\(=2\left(27x^3+8y^3\right)=2\left(3x+2y\right)\left(9x^2+6xy+4y^2\right)\)
b,\(x^4-16y^4=\left(x^2-4y^2\right)\left(x^2+4y^2\right)\)
\(=\left(x-2y\right)\left(x+2y\right)\left(x^2+4y^2\right)\)