Soldato
- Joined
- 18 Mar 2008
- Posts
- 12,751
Harro everyone
The textbook doesn't help. We haven't covered it in class. No one is online on facebook that can help.
OcUK is my last resort
The equation z^3 + 4z^2 - 3z + 1 = 0 has roots a, b and c
Find the values of:
a + b + c
ab + bc + ac
abc
Somehow I need to factorise the equation, cos then I'll get values for -a, -b and -c. But how? This question comes up in every exam paper (further pure 1) and I've got no idea how to do it
Thanks friends
The textbook doesn't help. We haven't covered it in class. No one is online on facebook that can help.
OcUK is my last resort
The equation z^3 + 4z^2 - 3z + 1 = 0 has roots a, b and c
Find the values of:
a + b + c
ab + bc + ac
abc
Somehow I need to factorise the equation, cos then I'll get values for -a, -b and -c. But how? This question comes up in every exam paper (further pure 1) and I've got no idea how to do it
Thanks friends