Sagot :
Bonjour,
Ex 1:
Calculer:
On remplace par:
A= 4x-5 => A(-3)= 4(-3)-5= -12-5= -17
B= -2y-6 => B(4.5)= -2(4.5)-6= ...calcule
C= 2x²+3x-2 => C(-5)= 2(-5)²+3(-5)-2= 2(25)-15-2=...calcule
Ex 2:
Réduire les expressions:
D= 6x-11
E= 2y²+2y-1
Bonjour,
Ex 1:
Calculer:
On remplace par:
A= 4x-5 => A(-3)= 4(-3)-5= -12-5= -17
B= -2y-6 => B(4.5)= -2(4.5)-6= ...calcule
C= 2x²+3x-2 => C(-5)= 2(-5)²+3(-5)-2= 2(25)-15-2=...calcule
Ex 2:
Réduire les expressions:
D= 6x-11
E= 2y²+2y-1