Besoin d’aide svppp

I=6+(5y-2)(3-4y)
=6+15y-20y^2(sa veut dire carré)-6+8y
=20y^2+23y

J=5p-(4p+3)(-2p-5)
=5p-(-8p-20p-6p-15)
=5p-8p+20p+6p+15
=23p+15

K=6(2x-1)(3-x)
=(12x(-6))(3-x)
=36x-12x^2-18+6x

Bonne journée