填空a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以()

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填空a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以()
填空a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以()

填空a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以()
a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以(a+b-c)

a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以(a+b-c)

a+b-c

提取公因式（x+y-z）可得该空应填：a+b-c