约分:m^3+4m^2+4m/m^3-4m
问题描述:
约分:m^3+4m^2+4m/m^3-4m
a^2-3a+2/a^2-4a+3
x^+5x-6/x^2-3x+2
答
m^3+4m^2+4m/m^3-4m=m(m+2)^2/m(m+2)(m-2)=(m+2)/(m-2)a^2-3a+2/a^2-4a+3=(a-1)(a-2)/(a-1)(a-3)=(a-2)/(a-3)x^+5x-6/x^2-3x+2=(x-2)(x-3)/(x-1)(x-2)=(x-3)/(x-1)