Rút gọn các biểu thức sau: a) 2/ 3x + x/ x-1+ 6x^2-4/ 2x( 1-x);
Giải thích
a) 23x+xx−1+6x2−42x(1−x)=23x−x1−x+2(3x2−2)2x(1−x)=23x−x1−x+3x2−2x(1−x)=2(1−x)−x.3x+3(3x2−2)3x(1−x)=2−2x−3x2+9x2−63x(1−x)=6x2−2x−43x(1−x)
a) 23x+xx−1+6x2−42x(1−x)=23x−x1−x+2(3x2−2)2x(1−x)=23x−x1−x+3x2−2x(1−x)=2(1−x)−x.3x+3(3x2−2)3x(1−x)=2−2x−3x2+9x2−63x(1−x)=6x2−2x−43x(1−x)