若a+3b=0,则(1-b/a+2b)÷a^2+2ab+b^2/a^2-4b^2
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
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(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
若a+3b=0,则(1-a+2b分之b)除以a²-4b²分之a²+2ab+b²=
已知(3a-b+1)的绝对值+(3a-b/2)^2=0求b^2/a+b除以(b/a+b*ab/a+b)的值
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=
已知2a-b+1的绝对值+(3a+3/2b)^=0,求(b^/a+b)÷{[(b/a-b)+1][a-(a^/a+b)]
若a/b=2,求分式a*a+ab-b*b/a*a-2ab+2b*b
已知|2a-b+1|+(3a+3/2b)=0,求代数式3ab+a/a-b÷a+3b/a-b的值,
已知a+2b=0,求a*a+2ab-b*b/2a*a+ab+b*b
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&