香港必買2017

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呢條題錯左D咩?

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(2x3)^2 =(2x3)(2x3) =(2x3)(2)+(2x3)(3) =2x2+2x3+2x3+3x3 =4+6+6+9 =25 點解計唔到36既?過程中錯左D咩? 更新: To:雞尾包 咁係咪咁樣做? =(2x3)(2)x(2x3)(3)

最佳解答:

(2x3)(2x3) = (2x3)(2)+(2x3)(3) 錯係呢步, 乘乘下點解走個加出黎 唔係以下情況喎 (2x3)(2+3) = (2x3)(2)+(2x3)(3) 睇清楚..

其他解答:

首先就後(2x3)既2次方 之後就係(2x3)(2x3) =(6)(6)拆( )號 =6x6 =36 -------------------------------------------------------------------------------------------------------------------- 2x3)^2 =(2x3)(2x3) =(2x3)(2)+(2x3)(3)<-----你上面都繼好左(2x3)(2x3)但點解會有個3呢？在那裡來的 =2x2+2x3+2x3+3x3 =4+6+6+9 =25|||||(2X3)^2 =6^2 =36 係唔係咁AR... 應用計()先... 唔好諗到咁複習... =]|||||(2x3)^2 =(2x3)(2x3) <--------唔可以噤拆 除非拒係 (2 x 3) x (2+ 3) 先可以拆到你下一個step =(2x3)(2)+(2x3)(3) =2x2+2x3+2x3+3x3 =4+6+6+9 =25|||||(2x3)^2------------------ok =(2x3)(2x3)----------------ok...但你係應該張(2x3)變左做6...之後2次方即克搞掂... =(2x3)(2)+(2x3)(3) =2x2+2x3+2x3+3x3 =4+6+6+9 =25 so...it is: (2x3)^2 =6^2 =36...that's it|||||(2x3)^2 =(2x3)(2x3) =2x3x2x3 =6x6 =36 2007-10-07 21:47:24 補充： 第三個step出錯(2x3)(2x3)唔等於(2x3)(2) (2x3)(3) 2007-10-07 21:58:13 補充： 唔係, (2x3)(2x3)=(2x3)x(2x3)=2x3x2x3