數學因式分解
回答 (3)
2009-06-12 7:19 am
✔ 最佳答案
x ^2 -6x + 9 -y^2=(x^2 - 6x +9 )-y^2
=[(x)^2 -(2)(x)(3) +(3)^2] -y^2
=(x-3)^2 -y^2
參考: m3
2009-06-09 8:25 pm
x²-6x+9-y²
=[(X-3)(X-3)]-y²
=(x-3) ²-y²
=(x-3+y)(x-3-y)
=[(X-3)(X-3)]-y²
=(x-3) ²-y²
=(x-3+y)(x-3-y)
2009-06-07 8:28 pm
x^2 - 6x + 9 - y^2
= ( x - 3)^2 - y ^2
= (x - 3 +y)( x - 3 - y).
= ( x - 3)^2 - y ^2
= (x - 3 +y)( x - 3 - y).
收錄日期: 2021-04-25 22:37:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090607000051KK00647