Question 177960
{{{16x^4-40x^2+9}}}
:
{{{highlight((4x^2-1)(4x^2-9))}}}
:
remember the leading term is just a multiple of the 1st terms of the factors
 and the constant terms is just a multiple of the last terms of the factors.
:
That is where you begin. One just starts playing with combinations that will equal the middle term when multiplied together.