问题
解答题
计算:(x-1+y-1)÷(x-1-y-1)
答案
(x-1+y-1)÷(x-1-y-1)
=(
+1 x
)(1 y
-1 x
)1 y
=
÷y+x xy y-x xy
=
×y+x xy y-x xy
=
.y+x y-x
计算:(x-1+y-1)÷(x-1-y-1)
(x-1+y-1)÷(x-1-y-1)
=(
+1 x
)(1 y
-1 x
)1 y
=
÷y+x xy y-x xy
=
×y+x xy y-x xy
=
.y+x y-x