(5a-3b)(5a+3b)(25a^2-9b^2)
当a+b分之2b-a=5时,求代数式a+b分之2*(2a-b)+2a-b分之3(a+b)
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
如果a=b-4,那么5(a-b)^2-9(a-b)-3(a-b)^2+(a-b)的值是多少
化简2a-[3a-5a-(2a-7b)]等于( ).A、-7a+10b B、5a+4b C、-a-4b D、9a-10b
5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]
因式分解(a-b)-3a+3b (a+b)(a-b)-2b(3a-5b)
一.化简.5(a+b)²-3(2a+3b)-3(a+b)²+(2a+3b)
4(a+b)-5/2(a+b)^2+3(a+b)-3/2(a+b)^2=?
已知2(a+1)(a-1)-(a+b)(a-b)-5b=3,求(a+2b)(a-2b)的值
先化简再求值 (a-2b)(a²+2ab+4b²)-a(a-5b)(a+3b),其中a=-1,b=2
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a
(5a-4b)平方-(5a-4b)(3a-2b)