Question 39708
{{{20y^(2n) - y^n - 12}}}
{{{(4y^n + 3)*(5y^n - 4)}}}
check:
{{{(4y^n + 3)*(5y^n - 4) = 20y^(2n) + 15y^n - 16y^n -12}}}
{{{(4y^n + 3)*(5y^n - 4) = 20y^(2n) - y^n - 12}}}
OK