/x^2-1/=2x+1 ”//la dau gia tri tuyet doi’ giai pt 02/12/2021 Bởi Brielle /x^2-1/=2x+1 ”//la dau gia tri tuyet doi’ giai pt
/x^2-1/=2x+1 *TH1:x^2-1=2x+1 <=>x^2-2x-2=0 <=>x1=1+căn3 ;x2=1-căn3 *TH2:x^2-1=-2x-1 <=>x^2+2x=0 <=>x1=0 ;x2=-2 Bình luận
/x^2-1/=2x+1
*TH1:x^2-1=2x+1
<=>x^2-2x-2=0 <=>x1=1+căn3 ;x2=1-căn3
*TH2:x^2-1=-2x-1
<=>x^2+2x=0 <=>x1=0 ;x2=-2