Rút gọn biểu thức sau A= (1- 2 căn x/ 3 căn x+1- (1-2 căn x)/(3 căn x+1):(6 căn x+5/ (3 căn x+1)
Giải thích
A=1−2x3x+1−1−2x1−9x:6x+53x+1−2=9x−1−2x(3x−1)+1−2x3x+13x−1:6x+5−2(3x+1)3x+1=9x−2x−6x+2x3x+13x−1.3x+16x+5−6x−2=3x3x−1.13=x3x−1
A=1−2x3x+1−1−2x1−9x:6x+53x+1−2=9x−1−2x(3x−1)+1−2x3x+13x−1:6x+5−2(3x+1)3x+1=9x−2x−6x+2x3x+13x−1.3x+16x+5−6x−2=3x3x−1.13=x3x−1