Répondre :
Réponse :
exos 1:
A= 7x+35 B= 12x-2x² C= -3x+21
D= 6+y E= 2x²+13x+15 F= -8y²+6y-1
exos 2:
1)A(x)= (5 x 2 + 3) (1-2)= (10+3)(-1)= -13
2) A(x)= -5x²+8x+3
3)-5 x 2² + 8 x 2 + 3 = -1
exos 3:
A= 7(x-5) B= 5(y+1) C= 6x(x-2)
exos 4:
a) 2 x 0² + 3 = 10 - 5 x 0=> 3=0 oui
b) 2 x (-1)² + 3 = 10 -5 x (-1) => 5=15 non
c) 2 x 1² + 3 = 10 -5 x 1 => 5= 49 non
exos 5:
a) x=-11-3 => x=-14 b)x=5+6 => x=11 c)-x=12-5 => x= -7 d) x=11/5
e) x=2-3/4 => x= 1.25 f) -2x= -5-1 => x=-6/-2 => x=3 h) x= 0/8 => x=0
voila bon le 6 j'ai pas trop compris