khanhngocta07hd khanhngocta07hd
  • 04-08-2021
  • Mathematics
contestada

Giải các bất phương trình và biểu diễn tập nghiệm trên trục số
(X-1)(x+2)>(x-1)(x-1) +3

Respuesta :

rich99coms rich99coms
  • 04-08-2021
(x-1)(x+2)=(x-1)(x-1)+3
x2-x+2x-2=x2-x-x+1+3
x2+x-2=x2-2x+4
X+2x=4+2
3x=6
3x/3=6/3
x=2
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