Question

dati factor comun I exerciţiile:​

Answer 1

Răspuns:

Salutare!

a) 9x+9b=9(x+b)

b) 4a+8=4(a+2)

c) ac-bc= c(a-b)

d) 9e-7e=e(9-7)= e×2=2e

e) 21x+14y+28= 7(3x+2y+4)

f) 3+3ab= 3(1+ab)

g) 24a+18b= 6(4a+3b)

h) 3•2x+n•2x=2x(3+n)

i) 5+10+15+...+120= 5(1+2+3+...+24)= 5(24•25/2)=5(600/2)=5•300=1500