Question

Find all real zeroes of the function.

g(x)=2x^3+4x^2-2x-4

Answer 1

set it equal to 0
and factor out gcf if any

Answer 2

1,2,4,8 then what?

Answer 3

wats 1,2,4,8 ?

Answer 4

to find zeroes, you need to solve below :-

2x^3+4x^2-2x-4 = 0

Answer 5

i know but how do i soolve it?

Answer 6

factor 2 first

Answer 7

\(2x^3+4x^2-2x-4 = 0\)

\(2(x^3+2x^2-x-2) = 0\)

\(x^3+2x^2-x-2 = 0\)

Answer 8

Look at this cubic,
by inspection 1 is a zero of this equation (why ? )

Answer 9

so now i use synthetic division

Answer 10

Yup !

Answer 11

okk so i used it and i got a zero by using 1 but then i dont know how to find thezeroes

Answer 12

wats the depressed equation you got after synthetic division ?