1條F.2既數唔識

2006-10-16 3:07 am
 x^2-4y^2   7x-14y
 ———— ÷ ————
 -3y+8x    32x-12y

我唔識係只係步驟,唔好淨係寫答案

回答 (3)

2006-10-16 3:15 am
✔ 最佳答案
(x+2y)(x-2y)     4(-3y+8x)
__________  X  _________

 -3y+8x       7(x-2y)

   4(x+2y)
=  ______
    7
2006-10-16 3:22 am
= (x+2y)(x-2y) / (8x-3y) X 4(8x-3y) / 7(x-2y)

= 4(x+2y) / 7
參考: myself
2006-10-16 3:19 am
 x^2-4y^2   7x-14y
 ———— ÷ ————
 -3y+8x    32x-12y
= (x+2y)(x-2y) /(-3y+8x) x 4(8x-3y)/7(x-2y)


=(4x+8y)/7


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