Rút gọn các biểu thức: (3x-1)/(6x+2)-(3x+1)/(2-6x)-6x/(9x^2-1)
Giải thích
3x−123x+1+3x+123x−1−6x9x2−1=3x−12+3x+12−12x23x+13x−1=18x2−12x+223x+13x−1
=23x−1223x+13x−1=3x−13x+1
3x−123x+1+3x+123x−1−6x9x2−1=3x−12+3x+12−12x23x+13x−1=18x2−12x+223x+13x−1
=23x−1223x+13x−1=3x−13x+1