The number of terms that you get on simplifying (3x + 5) (x - 4) is
(3x + 5) (x - 4) = 3x(x - 4) + 5(x - 4) (using distributive property)
= 3x2 - 12x + 5x - 20
= 3x2 - 7x - 20
So, there are 3 terms.
What isthe number of terms that you get on simplifying (3x+5)(x-4)?