约分(1)-4a^2bc^3/16abc^5 ,(2)2a^2(x-y)^3/a(y-x)
问题描述：
约分(1)-4a^2bc^3/16abc^5 ,(2)2a^2(x-y)^3/a(y-x)
(1)x^2-25/x^2-5x
(2)a^2+4a+3/a^2+a-6
(3)-32a^3b^2c/24a^2b^3d
(4)-15(a+b)^2/-25(a+b)
(5)a^2-ab/a-b
(6)x^2-x-2/4-x^2
答
(1)-4a^2bc^3/16abc^5=-a/4c²(2)2a^2(x-y)^3/a(y-x)=-2a（x-y）²(1)x^2-25/x^2-5x(2)a^2+4a+3/a^2+a-6=a²+5a-6(3)-32a^3b^2c/24a^2b^3d=-4ac/3bd(4)-15(a+b)^2/-25(a+b)=3(a+b)/5(5)a^2-ab/a-b=a...