[請益] 請教一題國中數學問題
今天學生拿來問的題目 是國二生 正在學因式分解
4 2 2 2
題目:已知XY=5,X+Y=8 求 X -2X Y + Y = ?
自己有試著利用拆中間項、配方 還是沒辦法分解出來
除了暴力法把X ,Y硬解出來之外 不知還有無別的方法!
麻煩大家了 謝謝~
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第一次PO文 沒注意版規 抱歉了@@
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