Question

(a+2)(2a-3) i already have the answer but i have one question about it..
soo...
2a-3
* a+2
--------
4a-6
2a^2-3a
--------------
2a^2+a - 6 <------ the answer

MY QUESTION IS how did it become a (+) on 2a^2((((+))))a-6
the one PLUS sign ?!?!
someone please explain :(

Answer 1

(a + 2)(2a - 3) ---- using the FOIL method (first,outside,inside,last)

First -- multiply first terms in each set... a * 2a = 2a^2
Outside -- multiply outside terms in each set...a * -3 = -3a
Inside -- multiply inside terms in each set..2 * 2a = 4a
Last -- multiply last terms in each set...2 * -3 = -6
put them all together..
2a^2 - 3a + 4a - 6 -- combine like terms
2a^2 + a - 6

does that help ?

Answer 2

it becomes a plus when combining like terms because -3a + 4a = a

Answer 3

ahhhhhh that explains it :) thanks! i fogot about the FOIL.. thank you!!!!!!!!!

Answer 4

forgot*

Answer 5

anytime :)