4-4x+4x的平方分之2x-6除以(x-3)乘以3-x分之(x+3)乘以(x-2) =(2x-6)÷4÷(x-3)×(x+3)÷(3-x)×(x-2) =(x-3)÷2÷(x-3)×(x+3)÷(3-x)×(x-2)=-1÷2×(x+3)÷(x-3)×(x-2)=-(x+3)÷2(x-3)×(x-2) =-(x+3)×(x-2)÷2(...