(4ab-8a^2b^2) 4ab (2a b)
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题目是不是打错了?(a+b)/4a+(a+b)/4b通分后相加后=[(a+b)b+(a+b)a]/4ab=(a²+b²+2ab)/4ab=(a+b)²/4ab再答:(a+
(a^3-4a^2b-a+4ab^2)/a(a-2b+1)=(a^2-4ab+4b^2-1)/(a-2b+1)=[(a-2b)^2-1]/(a-2b+1)=(a-2b+1)(a-2b-1)/(a-2b
a为2,b为-4,结果为4
-2ab(3a^2-2ab-4b^2)=-6a³b+4a²b²+8ab³(2b-a)b-(2a-b)a=2b²-ab-2a²+ab=2b
1、(a²-b²)/(a+b)=(a+b)(a-b)/(a+b)=a-b2、[(a+b)²-4ab]/(a-b)²=[a²+2ab+b²-4
原式=5a²b(a-b)-3ab(a-b)²-5ab²(a-b)=ab(a-b)[5a-3(a-b)-5b]=ab(a-b)(5a-3a+3b-5b)=ab(a-b)(2
原式=(a-b)/a(a+b)÷[-a(a-b)/b^2(a+b)(a-b)]=-(a-b)/a(a+b)×[b^2(a+b)(a-b)/a(a-b)]=-(a-b)/a(a+b)×[b^2(a+b)
A=3A^2B+3AB^2+B^4,2B=-16AB^2+4A^2B+2C^4,A-2B=-A^2B+19AB^2+B^2-2C^4
9a^2-b^2b^2-a^2/49y^2+6xy+4x^29a^2b^2+12ab^2+4b^2-4a^3/3b-6x+2y-1
(1/ab)(a+b-4/(a+b))ab=15a-b=2(a-b)^2=4(a+b)^2=(a-b)^2+4ab=64a+b=8(ab=15>0,a-b=2>0所以a+b>0)(1/ab)(a+b-
答:(a-2b)(a+2b)(a²+2ab+4b²)(a²-2ab+4b²)=(a²-4b²)[(a²+4b²)
(a-b)/(a+b)x(a^4-a^2b^2)/(a^2-ab)=(a-b)/(a+b)xa^2(a^2-b^2)/{a(a-b)}=(a-b)/(a+b)xa^2(a+b)(a-b)/{a(a-b
原式=(2a-2b+3ab-3b)+(a-b+2a)-(8a-8b+ab-b)=8+9-3b+4+2a-32+3+b=-8+2a-2b=0还可以解出a和b的值带入
(3a-2b)(3a+2b)(3a+2b)-(3a+2b)(3a-2b)(3a-2b)=(3a-2b)(3a+2b)4
-5a^2b+6ab^2-4ab-2a^2b+4ab+3=-5a^2b-2a^2b+6ab^2-4ab+4ab+3=(-5-2)a^2b+6ab^2+3=-7a^2b+6ab^2+36x+2x^2-3
(1)6x+2x-3x+x+1=6x+1其中x=5原式=30+1=31(2)1/3m-3/2n-5/6n-1/6m=1/6m-14/6n=6/1m-7/3n其中m=6,n=3原式=1-7=-6第二题一
{(a-4ab除以(a+b)+b}除以{(a除以(a+b)-(b除以b-a)-(2ab除以a的平方-b的平方)}={(a-4ab+ab+b²)/(a+b)}/{(a²-ab+ab+
解原式=(a²+2ab²+b²-4ab)(a²-2ab+b²+4ab)-(a²-b²)²=(a-b)²(a+b
(2a-b)/(a-b)²×ab/(a-b)/(2a+b)(2a-b)=ab/(a-b)(2a+b)再问:应该是(b-a)(2a+b)分之ab吧再答:对我搞错了一个符号