You can just evaluate it by plugging in \(x=-2\) into the polynomial and you'll get the answer (since it's multiple choice)
yup :) I mean you can d the long division method in which the remainder will be the answer, but it's probably longer to do and since it's multiple choice, why not use a faster solution :o ?
i know o.o can u help me with another
i put B. but its wrong. :/ dont understand
o.o that is strange... that should be the correct answer
i know o.O and it cant be A
i even double checked it on Wolfram Alpha
I dunno someone must have assigned the answer to the wrong letter :S because B is definitely right !
yeah, im going to pick A :S
the system gives you multiple tries?
twice, first time i picked letter B and it was marked wrong.
well it would be good to bring this up to your teacher
yeah, i am going to email her.
ty kirby :)
im not sure about this one ^^
Ah this is an application of the Factor Theorem. Essentially, if you find that when plugging in x=-4 and x=-1 and the polynomial evaluate to 0 (for both of these x values), then these x values are zeroes.
You can also think of it this way: A zero is a value of x such that y=0 (the value that crosses the x-axis). So plugging in a value of x that is a zero, should give y=0