(a - 5b)(c - 5d)
ac-5ad-5bc+25bd = a (c-5d) + 5b (c+5d) = ...
ac-5ad-5bc+25bd a(c-5d)-5b(c-5d) (a-5b)(c-5d) FOIL First (a*c=ac) Outside (a*-5d=-5ad) Inside (-5b*c=-5bc) Last (-5b*-5d=25bd) ac-5ad-5bc+25bd
5m
The other factor is 1.
(a + 2b)(a + 2b)
factor the trinomial 16x^2+24x+9
That does not factor neatly.
You can't factor it
Factor x2 plus 12xp plus 36p2 is (x+6p)(x+6p).
No
1
Not factorable