Answer:
x^2 -7x-18
Step-by-step explanation:
(x-9)(x+2)
FOIL
first x*x = x^2
outer 2x
inner -9x
last -9*2 =-18
Add together
x^2 +2x-9x-18
Combine like terms
the third one
D
first you have to do 6 times 3 and get 18 then you need to add 3 to that then divided that by 2 then you get your answer
6x+3 -6x =3
6x-6x= 3-3
0 = 0
