(2a+2b)*(a+2b)-2b^2=2a^2+5ab
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
a+b/2ab
2AB/A+B
(a-b)(a^2+ab+b) 化简
已知a+2b=0,求a*a+2ab-b*b/2a*a+ab+b*b
若a/b=2,求分式a*a+ab-b*b/a*a-2ab+2b*b
已知a+b=-2,ab=-2分之5,求a(a+b)(a-b)-a(a+b)平方
已知3a*a+ab-2b*b=0(a不等于0,b不等于0),求a/b-b/a-(a*a+b*b)/ab的值.
a除以(a-b)=2,求(a²+ab)(a-5b)除以(a-b)(a²-5ab)
先化简,再求值;[(2a-b/a b)-(b/a-b)]÷{(a-2b/a b) [ab/(a-b)2]},其中b/a=
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b