Answers

2015-09-07T19:06:22+08:00
1.=(2ab+3a))^3
   =6a^3b^3+9a^3

2.=((2x^2+1)+(x^2+4))^3
   =2x^5+1)+(X^3+12
    =2x^8+13
1 5 1
thank you
wc
can you show me how did you get that?