小學及中學教育
題:
maths問題?(from 2)
fdfdfdf
2006-10-13 19:39:46 UTC
分解為因式
5(x-2y)^3-10(x-2y)^2
6ab(a-2b)-8b^2(2b-a)
五 答案:
carbon
2006-10-13 19:46:48 UTC
5(x-2y)^3-10(x-2y)^2 6ab(a-2b)-8b^2(2b-a)
=3
2006-10-13 19:47:31 補充:
5(x-2y)^3-10(x-2y)^2=5(x-2y)^2(x-2y-2)6ab(a-2b)-8b^2(2b-a) =6ab(a-2b)+ 8b^2(a-2b) =2b(a-2b)(3a + 4 b ) Hope this you may understand more
?
2006-10-13 19:44:55 UTC
[5(x-2y)^2][(x-2y)-2]
2b(a-2b)(3a+4b)
C
2006-10-13 19:44:17 UTC
5(x-2y)^3-10(x-2y)^2
=5(x-2y)^2(x-2y-2)
6ab(a-2b)-8b^2(2b-a)
=6ab(a-2b)+ 8b^2(a-2b)
=2b(a-2b)(3a + 4 b )
Hope this you may understand more
?
2006-10-13 19:42:14 UTC
^ 呢個係咩符號?
娉婷
2006-10-13 19:41:52 UTC
咦!我識做喎^3^
2006-10-13 19:44:48 補充:
h3022874 係衰人,大家小心d,佢係德國球迷狂!
ⓘ
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