3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=
(a+2b)(2a+4b)(3a+6b)(4a+8b)
3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=
1.(a-b)^2(b-a)^3(a-b)^-4
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)
计算:((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)
a+(a+b)+(a+2b)+(a+3b)+...+(a+99b)=
a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?
当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b
如果a-2b/a+2b=3,求a+2b/a-2b+3a-6b/4a+8b
(a-2b)/(a+2b)=3,求(a+2b)/(a-2b)+(3a-6b)/(4a+8b)的解,
先化简,再求值:(2a-b)^2-(2a+b)(a-b)-3(a-3b)(a+3b),其中|a-1|+b^2=6b-9
若a,b满足|a+5b-2|+(a+b-6)²=0,求代数式(a-3b)(a+2b)-(a+5b)(a+3b)