(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
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(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)(a^2
(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a_2)/(b^2+b-6)
=(a^2b-ab-a+1)/(ab^2+3ab-b-3)×(b^2+b-6)/(a^2+a_2)
=(a^2b-ab-a+1)(b^2+b-6)/(ab^2+3ab-b-3)×(a^2+a_2)
=(ab-1)(a-1)(b+3)(b-2)/(ab-1)(b+3)(a+2)(a-1)
=(b-2)/(b+3)
(a^2b-ab-a+1)/(ab^2+3ab-b-3)÷(a^2+a-2)/(b^2+b-6)
=(ab-1)(a-1)/(ab-1)(b+3)×(b+3)(b-2)/(a+2)(a-1)
=(a-1)/(b+3)×(b+3)(b-2)/(a+2)(a-1)
=(b-2)/(a+2)
(a+b-2ab)(a+b-2)+(1-ab)^2
a+b/2ab
2AB/A+B
a+b/2ab
急……ab/(a+b-1)(a+b) + ab/(a+b)(a+b+1) + ab(a+b+1)(a+b+2) + …… + ab/(a+b+98)(a+b+99) + ab/(a+b+99)(a+b+100)
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+b+98)(a+b+99)+ab/(a+b+99)(a+b+100)
(a+ab)-[(ab-2b)-a]-(-9ab),其中a+b=-7,ab=3.
因式分解(a+b-2ab)(a+b-2)+(1-ab)(1-ab)
ab+a+b+1-2ab=2ab,则a+b的值为?
ab^3+b^2+b-a+1
因式分解ab(ab+1)^2-ab(a+b)-a-b+1 急求!
2(a²b+ab)-2(ab²-1)-2ab²-2ab 化简就行了
已知a-b=,ab=1/8,求-2ab+ab+ab的值
[(a^2-2ab)/-ab+b^2]/[(a/a+b)/(2ab/2b-a)]
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
因式分解:(a^2b^2+ab)^2-(ab+1)^2
(-3ab)(a^2b-3ab^2+1)