通分6ab²分之x与9a²bc分之y
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3/2a^2b与(a-b)/3ab^2c的公分母为6a^2b^2c,3/2a^2b=9bc/6a^2b^2c,(a-b)/3ab^2c=2(a-b)a/6a^2b^2c
1.c/ab=c²/abca/bc=a²/abcb/ac=b²/abc2.1/x²+x=(x+1)/(x³+2x²+x)-1/x²
一、约分(1)5x/25x²=1/5x(2)9a²+6ab+b²/3a+b=(3a+b)²/(3a+b)=3a+b二、通分(1)x/3y与3x/2y²
先把各个分式的分母分解因式,找到最简公分母.因为9-3a=3(3-a),a²-9=(a-3)(a+3),a²-6a+9=(a-3)²所以最简公分母是3(a+3)(a-3)
5/(-2a),2/(9a^2b^3)-45ab^3/(18a^2b^3),4/(18a^2b^3),再问:约分(3x的立方+6x的平方y)分之(x的立方-4xy的平方)再答:(x^3-4xy^2)/
(1)x^2+6x+9/x^2-9=(x+3/x)^2-9=(x+3/x+3)(x+3/x-3)(2)m^2-3m+2/m^-m=m^2-4m+2/m^2通分:(1)x/6ab^2,y/9a^2bc3
若是:①4x²-y²和②X/(3Y-6X),则公分母是3(y-6x);若是:①1/(4x²-y²)和②X/(3Y-6X),①=1/[(2x-y)(2x+y)],
8分之9通分?只有一个分数,不用通分.
解最简公分母2(x+y)²,∴(x-y)/(2x+2y)=(x+y)(x-y)/2(x+y)²=(x²-y²)/2(x+y)²xy/(x+y)
a²+2a+1=(a+1)²所以最简公分母是a²(a+1)²所以(a-1)/(a²+2a+1)=a²(a-1)/[a²(a+1)&
(1)6c/a²b=18bc/a²b²c/3ab²=ac/3a²b²(2)x-y/2x+3y=(x-y)(x+y)²/(2x+3y
3y与2y²的最简公分母是6y²3y分之x=x/(3y)=(2y×x)/(2y×3y)=(2xy)/(6y²)2y平方分之3x=3x/(2y²)=(3×3x)/
2/3a与3/-4ab²最简公分母为12ab²,则2/3a=8b²/12ab²3/-4ab²=-9/12ab²1/x-y与2/x²
公分母是2(x+3)²(x-3)所以6-2x分之x-1=2(x+3)²(x-3)分之[-2(x-1)(x+3)²]x²-9分之6=2(x+3)²(x-
3a分之2与-4ab的平方分之3通分2/3a-3/4ab^2=2ab/3ab^2-3/4ab^2=8ab/12ab^2-9/12ab^2=(8ab-9)/12ab^2
分式ab/xy^2,bc/x(a-b),a/y(b-a)的最简公分母是:abc再问:可以写写过程吗再答:ab/xy^2=abc/xy²cbc/x(a-b)=abc/ax(a-b)a/y(b-
解最简公分母为x(x-y)(x+y)∴1/(x²-y²)=x/x(x²-y²)=x/x(x-y)(x+y)1/(x²+xy)=(x-y)/x(x+y)
(a-1)/(a²+2a+1)和6/(a²-1)的分母分别是:a²+2a+1和a²-1.∵a²+2a+1=(a+1)²a²-1=(