識唔識計數???星期三我要交嫁(呢個禮拜)。高手請進(10點)

2007-10-01 7:27 pm

X ( X + 4) - X ( X - 8 ) = 24

X=?(請列方程)

回答 (4)

2007-10-01 7:31 pm

✔ 最佳答案

X2 (X square)+ 4X - X2(X square) + 8X = 24

12X = 24
X = 2

參考: myself

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2007-10-01 7:39 pm

X ( X + 4) - X ( X - 8 ) = 24
X(X+4-X+8)=24
12X=24
X=2

參考: me

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2007-10-01 7:32 pm

X ( X + 4) - X ( X - 8 ) = 24
X(X+4-X+8)=24
12X=24
X=2

參考: me

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2007-10-01 7:31 pm

X ( X + 4) - X ( X - 8 ) = 24
X^2+4X-X^2+8X=24
12X=24
X=2

參考: ME

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