(x-3)/(x^2+3x+2)×(x^2)/(x^2-4x+3)怎么算?
问题描述:
(x-3)/(x^2+3x+2)×(x^2)/(x^2-4x+3)
怎么算?
答
注意
x^2+3x+2=(x+1)(x+2)
x^2-4x+3=(x-1)(x-3)
化简即可啊