(-3a^3b^2)^2*(-2ab^2)^3/(9a^5b^4)
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
已知a-b=5,ab=-4,求代数式5a^2b(a-b)-3ab(b-a)^2+5ab^2(b-a)的值
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
(2a-5b+3ab)+(3a-b)-(8a-9b+ab),其中a-b=4,ab=3
(a-2b)(a^2-2ab+4b^2)-a(a-5b)(a+3b)
2b根号a/b+3/a根号a立方b-(4a根号b/a+根号9ab)
若a+b=3,ab=-2,求(5a-5b-ab)-(4a-6b-3ab)
合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3
合并同类项:-5a^b+6ab^-4ab-2a^b+4ab+3
先化简再求值﹕若a-b等于5,ab等于-5,求(2a+3b-2ab)-(a+4b+ab)-(3ab-2a+2b)
如a-b=4,ab=1,则(2-ab+2a+5b)-(3ab+2b-2a)-(3a+4b-ab)=