Đáp án:
$2x - 8 = x - 1$
$=> 2x-x=-1+8$
$=> x=7$
$1+ 2x - 5/6 = 1 - x / 2$
$=> 2x+x/2=1+5/6-1$
$=> 2x+x/2=5/6$
$=> 4x+x=5/3$
$=> 5x=5/3$
$=> x=1/3$
$x - 5 / x - 1 = 2x - 3 /x² - 1 + x / x - 1$ (điều kiện x$\neq$ ±1)
$=> (x-5)(x+1)=2x-3+x(x+1)$
$=> x²+x-5x-5=2x-3+x²+x$
$=> x²-x²+x-5x-2x-x-5+3=0$
$=> -7x-2=0$
$=> -7x=2$
$=> x=-2/7$ (nhận)
$2x³+5x²-3x=0$
$=> x(2x²+5x-3)=0$
$=> x=0$ hoặc $2x²+5x-3=0$
$=> x=0$ hoặc $2x²+6x-x-3=0$
$=> x=0$ hoặc $2x(x+3)-(x+3)=0$
$=> x=0$ hoặc $(x+3)(2x-1)=0$
$=> x=0$ hoặc $x=-3$ hoặc $x=0,5$
BẠN THAM KHẢO NHA!!!
