分式计算步骤写清楚(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4(xy-x²)÷ ————— —— - —————— a+2-——xy x+y 2x-y 2-a(4) x+2 x-1 4-x (5)a²+a a(—— -——
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![分式计算步骤写清楚(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4(xy-x²)÷ ————— —— - —————— a+2-——xy x+y 2x-y 2-a(4) x+2 x-1 4-x (5)a²+a a(—— -——](/uploads/image/z/5257070-62-0.jpg?t=%E5%88%86%E5%BC%8F%E8%AE%A1%E7%AE%97%E6%AD%A5%E9%AA%A4%E5%86%99%E6%B8%85%E6%A5%9A%EF%BC%881%EF%BC%89+x%26sup2%3B-2xy%2By%26sup2%3B+%EF%BC%882%EF%BC%89x%26sup2%3B-y%26sup2%3B+4x%EF%BC%88x-y%EF%BC%89%2By%26sup2%3B+%EF%BC%883%EF%BC%89+4%EF%BC%88xy-x%26sup2%3B%EF%BC%89%C3%B7+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+%E2%80%94%E2%80%94+-+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+a%2B2-%E2%80%94%E2%80%94xy+x%2By+2x-y+2-a%EF%BC%884%EF%BC%89+x%2B2+x-1+4-x+%EF%BC%885%EF%BC%89a%26sup2%3B%2Ba+a%EF%BC%88%E2%80%94%E2%80%94+-%E2%80%94%E2%80%94)
分式计算步骤写清楚(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4(xy-x²)÷ ————— —— - —————— a+2-——xy x+y 2x-y 2-a(4) x+2 x-1 4-x (5)a²+a a(—— -——
分式计算步骤写清楚
(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4
(xy-x²)÷ ————— —— - —————— a+2-——
xy x+y 2x-y 2-a
(4) x+2 x-1 4-x (5)a²+a a
(—— -————)÷—— ———÷(a-——)
x²-2x x²-4x+4 x a-1 a-1
没对其不过大体应该能看明白下面我给对齐了
(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4
(xy-x²)÷ ————— —— - —————— a+2-——
xy x+y 2x-y 2-a
(4) x+2 x-1 4-x (5)a²+a a
(—— -————)÷—— ———÷(a-——)
x²-2x x²-4x+4 x a-1 a-1
分式计算步骤写清楚(1) x²-2xy+y² (2)x²-y² 4x(x-y)+y² (3) 4(xy-x²)÷ ————— —— - —————— a+2-——xy x+y 2x-y 2-a(4) x+2 x-1 4-x (5)a²+a a(—— -——
(1).原式=x(y-x)×xy/(x-y)²=x²y/(y-x)
(2).原式=(x-y)-(2x-y)²/(2x-y)=-x
(3).原式=a+2+4/(a-2)=(a²-4+4)/(a-2)=a²/(a-2)
(4).原式=(x²-4-x²+x)/【x(x-2)²】×【x/(4-x)】=(-1)/(x-2)²
(5).原式=【(a²+a)/(a-1)】×【(a-1)/(a²-2a)】=(a+1)/(a-2)