Aidez moi svp maths c'est le numéro 29!

a. (1-racine5) (racine5+3)
= racine5 +3 -5-3racine 5)
= -2-3racine5

b. (3-5racine5)-(8+5racine5)
=3-5racine5-8-5racine5
=-5-10racine5

c.(5-racine5)(3+2racine5)
=15+10racine5-3racine5-10
=5+7racine5

d. (2-racine5)-(1-2racine5)
=2-racine5-1+2racine5
=1+racine5