通分:(1)ab分之x与bc分之y,(2)bd分之2c与4b²分之3ac,(3)a(x+2)分之x与b(x+2)分之y,(4)(x+y)²分之2xy与x²-y²分之x
问题描述:
通分:(1)ab分之x与bc分之y,(2)bd分之2c与4b²分之3ac,(3)a(x+2)分之x与b(x+2)分之y,(4)(x+y)²分之2xy与x²-y²分之x
答
:(1)ab分之x=cx/(abc);
bc分之y=ay/(abc),
(2)bd分之2c=8bc/(4b²d);
4b²分之3ac=3acd/(4b²d),
(3)a(x+2)分之x=bx/(ab(x+2));
b(x+2)分之y=ay/(ab(x+2)),
(4)(x+y)²分之2xy=2xy(x-y)/(x+y)²(x-y);
x²-y²分之x=x(x+y)/(x+y)²(x-y);
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