factorize completely :
16-36p squared
There are several useful formulas, though, such as
a^2-b^2 = (a+b)(a-b)
You have
16-36p^2
= 4^2-(6p)^2
= (4+6p)(4-6p)
= 4(2+3p)(2-3p)
16-36p squared
a^2-b^2 = (a+b)(a-b)
You have
16-36p^2
= 4^2-(6p)^2
= (4+6p)(4-6p)
= 4(2+3p)(2-3p)