Question 540430
{{{54x^3-16y^3=2(27x^3-8y^3)}}}
Use the formula {{{a^3-b^3=(a-b)(a^2+ab+b^2)}}}

{{{2(27x^3-8y^3)=2((3x)^3-(2y)^3)=2(3x-2y)(9x^2+6xy+4y^2)}}}