bonsoir
G= (3g+5)(4-2g)
=12g-6g²+20-10g
= 6g²+12g-10g+20
= 6g²+2g+20
I= (i+7)(3-2i)+(5i-2)(4i+1)
= 3i-2i²+21-14i+(20i²+5i-8i-2)
= 3i-2i²+21-14i+20i²+5i-8i-2
= -2i²+20i²-14i+3i+5i-8i+21-2
= 18i²-14i+19
K= (7k+4)(7k+4)
=14k²+16
H= (6-2h)(4h-5)
= 24h-30-8h²+10h
= 8h²+24h+10h-30
= 8h²+34h-30
J= (4j+3)(8-5j)-(2j+4)(7j-1)
= 32j-20j²+24-15j-(14j²-2j+28j-4)
= 32j-20j²+24-15j-14j²+2j-28j+4
= -20j²-14j²+32j-15j+2j-28j +24+4
= -34j²+9j+28
L= (8-3l)(8-3l)
= 64+9l²
=9l²+64
M= (2+5m)(2-5m)
= 4-10m+10m-25m²
= -25m²+4
Voilà j'espère t'avoir aidé
