Question

化简下列分式:x^2+x/(x^2-1) x^2+4x/x^2+8x+16 ab^2(a-b)/a^2b-ab^2

Answer 1

x^2+x/(x^2-1)

=x(x+1)/(x+1)(x-1)

=x/(x-1)

x^2+4x/x^2+8x+16

=x(x+4)/(x+4)^2

=x/(x+4)

ab^2(a-b)/a^2b-ab^2

=ab^2(a-b)/ab(a-b)

=