Répondre :
E= (3t+4)(5t-2)-(20t-12)
=15t²-6t+20t-8-20t+12
=15t²-6t+4
F=4-3t(2-5t)
=4-6t+15t²
Donc F=E
E=(3t+4)(5t-2)-20t+12=15t^2-6t+20t-8-20t+12=15t^2-6t+4
F=4-3t(2-5t)=4-6t+15t^2
^2= au carré
E=F=4-6t+15t^2
E = (3t + 4)(5t-2)-(20t - 12)
F = 4-3t(2 - 5t)
Démontrer que E = F.
Merci de votre aide.
E= (3t+4)(5t-2)-(20t-12)
=15t²-6t+20t-8-20t+12
=15t²-6t+4
F=4-3t(2-5t)
=4-6t+15t²
Donc F=E
E=(3t+4)(5t-2)-20t+12=15t^2-6t+20t-8-20t+12=15t^2-6t+4
F=4-3t(2-5t)=4-6t+15t^2
^2= au carré
E=F=4-6t+15t^2