Giải phương trình 2x/(x+1)+5/(x-1)=(2x^2-1)/(x^2-1)
Giải thích
2xx+1+5x−1=2x2−1x2−1 x≠1x≠−1⇔2x(x−1)+5(x+1)(x−1)(x+1)=2x2−1x2−1⇒2x2−2x+5x+5=2x2−1⇔3x=−6⇔x=−2 (t/m)
2xx+1+5x−1=2x2−1x2−1 x≠1x≠−1⇔2x(x−1)+5(x+1)(x−1)(x+1)=2x2−1x2−1⇒2x2−2x+5x+5=2x2−1⇔3x=−6⇔x=−2 (t/m)