(ab+2b)(3a-1)
要用直式..記得係直式啊!!!!!!!!!
更新1:
答案我有,我要個步x,要用直式做步x, 你地比個答案我有咩用?
中一數學..(問一題=.=)聽日交,10分!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
回答 (9)
2007-10-18 3:40 am
✔ 最佳答案
(ab+2b)(3a-1)ab+2b
× 3a-1
--------------------------
3a^2b+6ab
-ab-2b
--------------------------
3a^2b+5ab-2b
2007-10-18 3:37 am
(ab+2b)(3a-1)
=3a(ab+2b)-1(ab+2b)
=3(a)2次b+6ab-ab-2b
=3(a)2次b+5ab-2b
must right
=3a(ab+2b)-1(ab+2b)
=3(a)2次b+6ab-ab-2b
=3(a)2次b+5ab-2b
must right
2007-10-18 3:33 am
(ab+2b)(3a-1)
=(a+3b)x(3a-1)
=3bx4a-1
all don't use 直式??!!
=(a+3b)x(3a-1)
=3bx4a-1
all don't use 直式??!!
2007-10-18 3:28 am
=3a^2+5ab-2b
2007-10-18 3:25 am
b+5ab-2b
2007-10-18 3:23 am
3a2次b+5ab-2b
收錄日期: 2021-04-18 23:34:06
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