Giải phương trình (1-6x)/(x-2)+(9x+4)/(x+2)

1−6xx−2+9x+4x+2=x3x−2+1x2−4x≠±2⇔1−6xx+2+9x+4x−2x−2x+2=3x2−2x+1x−2x+2⇒−6x2−11x+2+9x2−14x−8=3x2−2x+1⇔−23x=7⇔x=−723S=−723