Jawabanmu

2014-08-21T22:33:21+07:00
4 ( b+c) (b+c) (c-b)
= 4b + 4c (b+c) (c-b)
= 4b + 4bc + 4c^2(c-b)
= 4b + 4bc + 4c^3 - 4bc^2
2014-08-21T22:43:53+07:00
4(b+c)^2(c-b)^0
4(b+c)(b+c)1
4(b^2+2bc+c^2)
4b^2+8bc+4c^2