Question

化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(xy-2z)(y+z-2x)+(x-

Answer 1

第二个分母写错了?

(y - x)(z - x)/(x - 2y + z)/(x + y - 2z) + (z - y)(x - y)/(x + y - 2z)/(y + z - 2x)

+ (x - z)(y - z)/(y + z - 2x)/(x - 2y + z) =1