Question

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Answer 1

x+2 set it equal to zero
x+2=0 solve for x
and then substitute x in this function 3x^4 +2x^3-x^2+2x=9 for x value

Answer 2

the fastest way is to use synthetic division

Answer 3

my online course doesn't explain what that is

Answer 4

sure would you like to apply synthetic division ?

Answer 5

@phi how do you not have a title lol great help from a Moderator

Answer 6

i wish i can draw better

Answer 7

ok i got the answer

Answer 8

x+2=0 solve for x
subtract 2 both sides
x=-2 write the coefficients
and bring down the leading coefficient