Sagot :
Bonjour
Développer, simplifier et réduire A.
A=2(7x+5)+3(4 x-1)
A = 14x + 10 + 12x - 3
A = 26x + 7
2 Factoriser
A= 8-2a
A = 2 (4 - a)
B=5xy-10x
B = 5x (y - 2)
C=(x+1) (2x+1)+(x+1) (7x-5)
C = (x + 1) (2x + 1 + 7x - 5)
C = (x + 1) (9x - 4).
Réponse :
Bonjour,
1)A=2(7x+5)+3(4x-1)
= 14x+10+12x-3
=26x+7
2) A=8-2a
=2(4-a)
B=5xy-10x
=5x(y-2)
c=(x+1)(2x+1)+(x+1)(7x-5)
=(x+1)(2x+1+7x-5)
=(x+1)(9x-4)