Question

分式的运算

1、用分式表示下列各式的商，并约分
4a^2b÷(6ab^2)=
-4m^3n^2÷2(m^3n^4)=
(3x^2+x)÷（x^2-x)=
(x^2-9)÷(-2x^2+6x)=

Answer 1

4a^2b÷(6ab^2)
=2a/乎改悄(3b)

-4m^3n^2÷2(m^3n^4)
=-2/n^2

(3x^2+x)÷（岁渣x^2-x)
=x(3x+1)/[x(x-1)]
=(3x+1)/(x-1)

(x^2-9)÷(-2x^2+6x)
=(x+3)(x-3)/[-2x(x-3)]
=-(x+3)/歼谈(2x)