32x³+(125/2)y³ 怎ㄇ分解??
2005-08-08 07:52:09 · 4 個解答 · 發問者 ? 1 in 科學 ➔ 數學
另外還有 x的6次方-1 怎ㄇ分
2005-08-08 09:52:48 · update #1
32x³+(125/2)y³
=(1/2)(64x³+125y³)
=(1/2)〔(4x)³+(5y)³〕
=(1/2)(4x+5y)(16x的2次方-20xy+25y的2次方)
x的6次方-1
=( x的3次方 )的2次方-1
=(x的3次方+1)(x的3次方-1)
=(x+1)(x的2次方-x+1)(x-1)(x的2次方+x+1)
2005-08-08 14:42:09 · answer #1 · answered by 老人家 4 · 0⤊ 0⤋
32x^3+(125/2)y^3
=(1/2)(64x^3+125y^3)
=(1/2)(4x+5y)(16x^2-20xy+25y^2)
立方和公式
2005-08-08 08:14:53 · answer #2 · answered by ? 7 · 0⤊ 0⤋
原式提出1/2就很好算了！
2005-08-08 08:10:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
挖= =超級難耶
是不是AMC的題目呀....
2005-08-08 07:53:59 · answer #4 · answered by Anonymous · 0⤊ 0⤋