Question

x平方-3x分之x平方-6x-9×x平方-11x+30分之x平方-5x-1

Answer 1

是+9

原式=(x-3)²/x(x-3)*x(x-5)/(x-5)(x-6)-1

=(x-3)/(x-6)-1

=(x-3-x+6)/(x-6)

=-3/(x-6)