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標題:
一條超簡單的數
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x(x+5)=36 和 (x+5)x=36
最佳解答:
x(x+5)=36 和 (x+5)x=36 they are the same, just solve x(x+5)=36 x(x+5)=36 x^2+5x=36 x^2+5x-36=0 (x+9)(x-4)=0 x=4 or x=-9 2006-10-19 18:39:26 補充: the solution of (x 5)x=36 is also x=4 or x=-9
其他解答:
x(x+5)=36 x^2+5x-36=0 (x+9)(x-4)=0 x=-9(捨去)或x=4 x=4 (x+5)x=36(同上) 2006-10-19 18:39:55 補充: 更正當x要係正數x=-9 先至要捨去不好意思
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