19.3(-2ab+3a)-(2a-b)+6ab= 1/2a^2-[(ab-a^2)+4ab]-1/2ab=(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)=急 写过程和结果
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19.3(-2ab+3a)-(2a-b)+6ab=1/2a^2-[(ab-a^2)+4ab]-1/2ab=(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)=急写过程和结果19.3(-2ab
19.3(-2ab+3a)-(2a-b)+6ab= 1/2a^2-[(ab-a^2)+4ab]-1/2ab=(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)=急 写过程和结果
19.3(-2ab+3a)-(2a-b)+6ab= 1/2a^2-[(ab-a^2)+4ab]-1/2ab=
(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)=
急 写过程和结果
19.3(-2ab+3a)-(2a-b)+6ab= 1/2a^2-[(ab-a^2)+4ab]-1/2ab=(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)=急 写过程和结果
3(-2ab+3a)-(2a-b)+6ab
=-6ab+9a-2a+b+6ab
=7a+b
1/2a^2-[(ab-a^2)+4ab]-1/2ab
=1/2a^2-(ab-a^2)-4ab-1/2ab
=1/2a^2-ab+a^2-4ab-1/2ab
=3/2a^2-11/2ab
(3a^2b+1/4ab^2)-(3/4ab^2+a^2b)
=3a^2b+1/4ab^2-3/4ab^2-a^2b
=2a^2b-1/2ab^2
(ab(a^-2ab)-a^2b(a-3b))÷(3a^b)
3(-ab+2a)-(3a-b)+3ab
(a-b)^3+2ab(a-b)
已知a+b=A,ab=A+2008,1-2(a+ab)+(ab-2b)=3A.求a+b和ab的值
-2ab(3a^2-2ab-4b^2) (2b-a)b-(2a-b)a-2ab(3a^2-2ab-4b^2)(2b-a)b-(2a-b)a
3ab(a²b-ab²-ab)-ab²(2a²-3ab+2a)
因式分解a(a+b)-(3ab-b^2)
3ab(a²b-ab²-ab)-ab²(2a²-3ab+2a)
(a-b)^2/ab-(a^2-b^2)/ab
a+b=5 ab=-3 (2a-3b-2ab)-(a-4b-ab)
已知ab/(a+b)=3,求(3a+ab+3b)/(2a-ab+2b)的值
a-b=3ab,则代数式2a-2b-ab/a-b+2ab的值是()
a-b=3ab,则代数式2a-2b-ab/a-b+2ab的值是()
ab/a+b=3 a-2ab+b/2a-3ab+2b?
3(-ab+2a)-(3a-b)
3(-ab+2a)-(3a-b)
a-b=5 ab=--1求(2a+3b-2ab)-(a+4b+ab)-(3ab-2a+2b)的值
计算ab-(2ab-3a²b)的结果是()A.3a²b+3ab B.-3a²b-ab C.3a²b-ab D.-3a²+3ab