Giải phương trình (x+2)/(x-2)-1/x=2/x(x-2)
Giải thích
x+2x−2−1x=2x(x−2)x≠0x≠2⇔x(x+2)−(x−2)x(x−2)=2x(x−2)⇒x2+2x−x+2=2⇔x2+x=0⇔xx+1=0⇔x=0 (loai)x=−1 (t/m)S=−1
x+2x−2−1x=2x(x−2)x≠0x≠2⇔x(x+2)−(x−2)x(x−2)=2x(x−2)⇒x2+2x−x+2=2⇔x2+x=0⇔xx+1=0⇔x=0 (loai)x=−1 (t/m)S=−1