1.(2a+b)(2a-3b)+a(2a+b)2.(x+y)^2-4(x+y-1)3.1/4a^4-1/2a^3+1/4a^2
问题描述:
1.(2a+b)(2a-3b)+a(2a+b)
2.(x+y)^2-4(x+y-1)
3.1/4a^4-1/2a^3+1/4a^2
答
1.(2a+b)(2a-3b)+a(2a+b)
2.(x+y)^2-4(x+y-1)
3.1/4a^4-1/2a^3+1/4a^2