Bonsoir,
A= -12y +24
B= 27t -6t²
C= (-6y )( -7y) + 3y² =
42y² +3y² ) 45y²
D= 6- 6t² +4 -6t +15t² *2=
6- 6t² +4 -6t +30t² =
24t² -6t +10
B
t= -4
(3*-4) (9 -2*-4 )=
-12 * (9-8)=
-12 *-1 =12
