Question

if x=-1 and x=2 are zeros of f(x)=3x^3 +Ax^2+Bx+2, Then the value of A+B is
A)-1 B)1 C)-9 D)9 E) cannot be determined please explain

Answer 1

you have 2 equations in 2 unknowns ...

Answer 2

?

Answer 3

idk how to go about solving this

Answer 4

let x=-1 and set it equal to zero
let x=2 and set it equal to zero

you then have 2 equations, and 2 unknowns

Answer 5

its a substitution, elimination, or whatever method you feel comfortable with to solve the system

Answer 6

AH

Answer 7

substituion thank you

Answer 8

youre welcome

Answer 9

i neda a page with all the things i can do wiyth equations

Answer 10

all the things ... hmm, not really sure what that would look like

Answer 11

summer break makes me forget my abilities ic an do with algebra

Answer 12

lol

Answer 13

i need a good alg 2 backgroud for calc

Answer 14

yeah, the hardest thing about the calcs is algebra