# Type your text here 1/z=ba(z)/x**2+y**2 =x/x**2+y**2 + i(-y/x**2+y**2) z/ba(z)= (z*ba(z))/x'**2+y'**2 ba(z+z')= ba(z)+ba(z') ba(z*z')= ba(z)*ba(z') ba(z**n)=ba(z)**n ba(1/z')=1/z' ba(z/z')+ ba(z)/ba(z') a(z-z1)(z-z2) Q(z)=z**n-1+a*z**n-2+a**2+z**n-3 somme: -(a n-1)/a n -(b/a) produit: (-1)**n * a 0/ a n -1**(degres)* dernier /premeir