计算:(√a³b √ab³-√ab)×√ab
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(a+b)²-4ab=a²+b²+2ab-4ab=a²+b²-2ab下面一步不是因式分解的话,可以不要.=(a-b)²
(a-b)²/8a-[(a+b)/2-√ab]=(√a+√b)²(√a-√b)²/8a-4a(√a-√b)²/8a=(√a-√b)²[(√a+√b)&
(a-b)/ab-(a-c)/ac+(b-c)/bc =c(a-b)/abc-b(a-c)/abc+a(b-c)/abc =(ac-cb-ab+bc+ab-ac)/abc =0/abc =0
1.(a-b+4ab/a-b)(a+b-4ab/a+b)=(a-b+4b-a)(a+b-4b+a)=3b*(-3b)=-9b^2此题是否为[a-b+4ab/(a-b)][a+b-4ab/(a+b)]=
绝对值加根号等于0所以两个都等于0所以a-4=0,b-9=0a=4,b=9原式=a(a+b)/b^2*[a(a-b)/(a+b)(a-b)]=a(a+b)/b^2*[a/(a+b)]=a^2/b^2=
=(a-b)*根号a/[根号a(根号a+根号b)=(a-b)/(根号a+根号b)=(根号a-根号b)(根号a+根号b)/(根号a+根号b)=根号a-根号
a的三次方+b的三次方
绝对值和根号都大于等于0,相加等于0若有一个大于0,则另一个小于0,不成立.所以两个都等于0所以a-4=0,b+9=0a=4,b=-9所以原式=a(a+b)/b²*a(a-b(/(a+b)(
[√ab-ab/(a+√ab)]÷((√ab-a)/(a-b))=[√ab-ab/(√a(√a+√b))]÷((√a(√b-√a))/((√a-√b)(√a+√b)))=[√ab-√a*b/(√a+√
√a(√a√b)=3√b(√a5√b)=>a√ab=3√ab15b=>a-2√ab-15b=0=>(√a3√b)(√a-5√b)=0=>a=25b(a>0,b>0=>√a3√b>0)(2a3b√ab)
-(8a)2/45-2b=(21-b)2→-82a/45-2b=22(1-b)→-82a=41-b*45-2b→-64a=46-3b→-64a=642-b→a=b-2a+b=2(9a)b=(3b)a/
a√(3a/b)/b√(3b/a),(a>0,b>0)原式=√3a^2/b/√3b^2/a=√3a^3/√3b^3=a^2/b^2=(a/b)^2
a/(a-2b)×√[(a^2-4ab^2+4b^2)/a]=a/(a-2b)×√[(a-2b)^2/a]=√a*|a-2b|/(a-2b)=√a(a>2b),0(a=2b),-√a(a
a+b=-3ab=2√(b/a)+√(a/b)=(a+b)/√(ab)=-3/√2=-3√2/2
原式=(a^3b^3)^2=[(ab)^3]^2=(ab)^6=a^6b^6
解(a√b-b√a)/√ab=a√b/√ab-b√a/√ab=a/√a-b/√b=√a-√
=(√b)/(√a)+(√a)/(√b)错了!因为ab=2,a,b同号,而a+b=-3,所以a,
楼主您好:[√a+(b-√ab)/(√a+√b)]÷[a/(√ab+b)+b/(√ab-a)-(a+b)/√ab]=[√a+(b-√ab)/(√a+√b)]÷[a/(√ab+b)+b/(√ab-a)-
计算如下:(a+b)(a^2-ab+b^2)-(a+b)(a-b)=a^3+b^3-a^2+b^2