(2t−4)au carré+u(3v−4t) merci d'avance

(2t-4) au carré = (2t-4) (2t-4)
Soit 2t*2t +2t*-4+-4*2t+-4*-4
= 4t^2 -8t -8t +16
= 4t^2 -16t+16

u(3v-4t) = u*3v + u*-4t
= 3uv -4ut

(2t-4) au carré + u(3v-4t)
= 4t^2 -16t+16 + 3uv -4ut