Question

f(x) help still confussed

Answer 1

this time they already told you about f(-2) = 0 , f(1) = 9 f(4) = 0
so you have to plug -2 then 1 and then 4 into the equation
if you get same value like f(-2) = 0 f(1) = 9 f(4) = 0 then that is your answer

Answer 2

C

Answer 3

for example first one
replace x by -2