1) aw+bw+a+b
1.首先去reordering,
aw+bw+a+b
=aw+a+bw+b
2.然後可以抽去common factor
aw+a+bw+b
=a(w+1)+b(w+1)
3.這步的common factor為(w+1)
=a(w+1)+b(w+1)
=
(a+b)(w+1)______________________________________________________________
2) ku-kv+7v-7u
1. 一樣抽出common factor
k(u-v)+7(v-u)
2.在(v-u)抽出-1,變為
k(u-v)-7(u-v)
3.抽出common factor (u-v)
=
(k-7)(u-v)_____________________________________________________________
3) X^2-X+3x-3
1. 抽common factor.......( X^2= X 乘 X )
=
X(X-1)+3(x-1)ps. 我之前開了個post,post裡說明了因式分解的。
[ 此帖被bon1在2008-08-03 19:49重新編輯 ]