Question

Solve the equation x^3-5x^2+2x+8=0 given that -1 is a zero

Answer 1

idk I factored by grouping and ended up with x= {-4, sqrt(2), and 5 }

Answer 2

if x=-1 is zero
you can do synthetic division
or long division diving you polynomial by x+1

Answer 3

you equation in other words should be of the form
\[(x+1)(ax^2+bx+c)=0\]
you need to find that quadratic one

Answer 4

have you seen synthetic division before
or long division

Answer 5

hmm you said you did grouping, can you show how did you do it

Answer 6

the grouping would not work by the way
you need to know the other methods to do this
and you are not replying at all?

Answer 7

I'm sorry I was reviewing a test I took. So I'll so synthetic division?

Answer 8

oooohhh I get x = {-1, 2, 4}