Question 129621
Factor:
{{{4w^2-u^2}}} This is a difference of two squares: {{{(2w)^2-(u)^2}}} and it is factorable like this:
{{{A^2-B^2 = (A+B)(A-B)}}} so, for your problem:
{{{4w^2-u^2 - (2w+u)(2w-u)}}}