maths
posted by ianian on .
Three roots of f(x)=x^4−2x^3+ax^2+bx+c are −5, −3 and 4. What is the value of a+b+c?

I did this question for you here:
http://www.jiskha.com/display.cgi?id=1367223324
Did you not even bother to look back at your previous post??