Ex: p(x) = 2x³ + x² + ax + b
Detliminer actbt
P(3)=0 et P
2) on donne P(x) = 2x2²³² +2²_182
a forotoriber P(x)
by Resouche dans IR
by P(x)=0
b₂) P(x4=<0
h31 P/10/)=0