Question 914978
4x^4 - 8x^3 - 19x^2 + 23x - 6
x+2 is a factor
-2 is a zero
which leaves 
4x^3-16x^2+ 13x-3

x-3 is a factor
3 is a zero
which leaves 
4x^2-4x+1
x-0.5 is a factor
0.5 is a zero
which leaves 
4x-2
x-0.5 is a factor again
0.5 is a zero again