Réponse :
Bonjour
Explications étape par étape :
Exercice 45:
A)[tex]6x^{2} -5x[/tex] = 6x *x - 5 * x = (6x-5)*x
B) [tex]49y^{2} +14y[/tex] = 7y*7y + 7y*2 = 7y(7y+2)
C) [tex]9n^{2} - 6n[/tex] = 3n*3n - 3n*2= 3n(3n-2)
D) [tex]8r^{2} + 6r +2[/tex] = 2*[tex]4r^{2}[/tex] + 2*3r + 2*1 = 2*([tex]4r^{2} +3r+1[/tex])
Exercice 46:
A) 8n - 5n = 8*n - 5*n = (8-5)*n= 3n
B) 6x + x= 6*x + 1*x = (6+1)*x = 7x
C)7x - x = 7*x - 1*x = (7-1)*x = 6x
D) 3.5y + y = 3.5*y + 1*y = (3.5 + 1)*y = 4.5y
