(3/4a^4b^7+1/2a^3b^8-1/9a^2b^6)/(-1/3ab^3)^2
(3a+b)(3a-b) (-1/2a-b) (3y+2x)^2 (3ab+2b)^2 -8a^4b^/6ab^2 (3
分解因式(a+1)(a+3)(a+5)(a+7)+15(2a+b)(4a^2-2ab+b^2)-b(2a-b)^2a^3
(a-2b)(a^2+2ab+4b^2)-a(a+3b)(a-3b),其中a=-1/9,b=1
计算(a^3-4a^2b-a+4ab^2)/a(a-2b+1)
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
已知a-b=4,ab=-1,求(-2ab+2a+3b)-(a-4b+b)
已知实数a,b满足ab=-1/5,a+b=4/5,求a^2b+ab^2-a^3b^2-a^2b^3
已知1/a+1/b=4则a-3ab+b/2a+2b-7ab=?
已知1/a+1/b=7,求a-4ab+b/2a-3ab+2b的值
已知a-b=-1,ab=-2,求代数式(3a-4b-ab)-(a-2b+3ab)
先化简再求值 (a-2b)(a²+2ab+4b²)-a(a-5b)(a+3b),其中a=-1,b=2
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