中二數學(~急~)

用戶11797

2007-10-19 5:06 am

多項式簡介
分解為因式
1.x(a-7)-y(7-a)

回答 (5)

[匿名]

2007-10-19 5:13 am

✔ 最佳答案

x(a-7)-y(7-a)
=x(a-7)-y(-a+7)
=x(a-7)+y(a-7)
(a-7)(x+y)

參考: 自己

👍 0 👎 0

Benny T

2007-10-19 5:33 am

x(a-7)-y(7-a)
=x(a-7)+y(a-7)
=(a-7)(x-y)

👍 0 👎 0

用戶5864

2007-10-19 5:31 am

x(a-7)-y(7-a)
=x(a-7)+y(a-7)
=(x+y)(a-7)

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eric

2007-10-19 5:13 am

1.x(a-7)-y(7-a)
=(x+y)(a-7)

參考: 自己

👍 0 👎 0

Wai Kwan

2007-10-19 5:12 am

x(a-7)-y(7-a)
=x(a-7)+y(a-7)
=(a-7)(x+y)

👍 0 👎 0

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