计算(x平方-2x+1-y平方)/(x+y-1)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/17 18:48:15
计算(x平方-2x+1-y平方)/(x+y-1)计算(x平方-2x+1-y平方)/(x+y-1)计算(x平方-2x+1-y平方)/(x+y-1)把被除式分解因式:x平方-2x+1用公式法分解为(X-1

计算(x平方-2x+1-y平方)/(x+y-1)
计算(x平方-2x+1-y平方)/(x+y-1)

计算(x平方-2x+1-y平方)/(x+y-1)
把被除式分解因式:
x平方-2x+1 用公式法分解为(X-1)²
(X-1)²-y² 用公式法分解为(X+y-1)(X-y-1)
(x平方-2x+1-y平方)/(x+y-1)
=(x+y-1)(x-y-1)/(x+y-1)
=x-y-1