Question

关于分式约分题,1.x²-y²/x²+2xy+y²2.x²+4x+3/

Answer 1

1.x²-y²/x²+2xy+y²

=(x-y)(x+y)/(x+y)^2

=(x-y)/(x+y)

2.x²+4x+3/ x²+x-6

=(x+1)(x+3)/(x+3)(x-2)

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

3.m²+3m/9-m²

=m(m+3)/(3+m)(3-m)

=m/(3-m)