3a^2+7ab+2b^2
已知a^2+ab+b^2|ab(a+b),求证(a-b)^3>3ab
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
a+b/2ab
2AB/A+B
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
已知a+b=5,ab=3,求2(a^2-b)-2(ab-b^2)-(a^2-3ab-7b)-2b^的值
5ab^2-7a^2b-8ab^2-3a^b合并同类项
(初二数学)化简2a-7ab+2b除以a+b+3ab
(2a^2+3ab+b^2)-(a^2+ab)
3(-ab+2a)-(3a-b)+3ab