数学化简T,急【(3a-b)(3a+b)+5a(3a+b)】/(3a+b)
化简求值a/(a-b)+b/(a+b)+b^2/(a^2-b^2) 当a:b=3:
化简下列二次根式:根号a^3(a-b)^3,根号(a-b)^5(a+b)^4,根号(a-b)/(a+b),且a>b>0.
[a+b][a-b]+3a
3a(a-b)-5b(a-b)
怎样化简 [(3a+2b)(3a-2b)-(a+2b)(5a-2b)]/4a
(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)
化简求值(a-2b)(a+2b)-(a-5b)(a-5b)(a+3b),a=-1,b=1
计算:3a+4b/a-b+3b/b-a-4a/a-b
3a/a-4b +a+b/4b-a -7b/a-4b
因式分解(a-b)-3a+3b (a+b)(a-b)-2b(3a-5b)
化简求值:(a-b)(a+b)+(2a-b)(a-2b)-3a(a-b),其中a=三分之一,b=负二