Question

x²－y²－x＋y 因式分解，简要说明下，因为我不懂，哭。。。有分加

Answer 1

x²－y²－x＋y
=(x+y)(x-y)-(x-y)
=(x+y-1)(x-y)

主要运用平方差公式 两个数平方的差=两个数的和乘两个数的差

Answer 2

x²－y²－x＋y
=(x²－y²)－(x-y)
=(x+y)(x-y)-(x-y)
=(x-y)(x+y-1)

Answer 3

x²－y²－x＋y
= (x²－y²) - (x-y)
=(x+y)(x-y) -(x-y)
=(x-y)(x+y-1)

Answer 4

(x+y)(x-y)-(x-y)=(x-y)(x+y-1)

我是最佳答案哇哇哇

Answer 5

x²－y²－x＋y
=(x+y)(x-y)-(x-y)
=(x-y)(x+y-1)

Answer 6

xx - yy - x+y就是两个一样的数相乘就是平方