异分母分式的加减计算. 1÷(x+2)-2÷(x-2) x-2-x^2÷(x-2) 计算(4/a^2-4)+(1/2-a)1÷(x+2)-2÷(x-2)x-2-x^2÷(x-2)(4/a^2-4)+(1/2-a)

问题描述:

异分母分式的加减计算. 1÷(x+2)-2÷(x-2) x-2-x^2÷(x-2) 计算(4/a^2-4)+(1/2-a)
1÷(x+2)-2÷(x-2)

x-2-x^2÷(x-2)

(4/a^2-4)+(1/2-a)