Giải phương trình 2/(x+1)+(2x+3)/(x^2+x+1)
Giải thích
2x−1+2x+3x2+x+1=2x−12x+1x3−1x≠1⇔2x2+x+1+2x+3x−1x−1x2+x+1=4x2−1x−1x2+x+1⇒2x2+2x+2+2x2+x−3=4x2−1⇔3x=0⇔x=0(tm)
2x−1+2x+3x2+x+1=2x−12x+1x3−1x≠1⇔2x2+x+1+2x+3x−1x−1x2+x+1=4x2−1x−1x2+x+1⇒2x2+2x+2+2x2+x−3=4x2−1⇔3x=0⇔x=0(tm)