初二分式计算
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初二分式计算初二分式计算初二分式计算“健康快乐城堡”:您好.先变更正负符号,再继续演算.(x+y)/(y-x)+y/(x-y)-(2x-y)/(y-x)=(y+x)/(y-x)-y/(y-x)+(y-
初二分式计算
初二分式计算
初二分式计算
“健康快乐城堡”:您好.
先变更正负符号,再继续演算.
(x+y)/(y-x)+y/(x-y)-(2x-y)/(y-x)
=(y+x)/(y-x)-y/(y-x)+(y-2x)/(y-x)
=(y+x-y+y-2x)/(y-x)
=(y-x)/(y-x)
=1
祝好.再见.
=[(x+y)/(x-y)]+[y/(x-y)]+[(2x-y)/(x-y)]
=[(x+y+y+2x-y)/(x-y)]
=(3x+y)/(x-y)