-3a>-6b,则a( )b
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
定义新运算a&b=a+b*b,则(3a*a&2b)-(a*a+b)=( )
(3a+2b)(6a-5b)(2b-3a)(5a+6b)
(a+2b)(2a+4b)(3a+6b)(4a+8b)
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)
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)=?,则a=?b=?
若a-b=5,ab=-6,求(a+b)(a+b)-3(a+b)(a-b)
[a+b][a-b]+3a
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3a=4b,则a/b=?,a+b/b=?
已知实数a,b满足a平方-2a+6b=5,则a+3b的最大值是多少