约分:(1) x^2+2x+1/x^2+x ; (2) 3x-6/x^2-4x+4; (3)ax^2/a+ax
问题描述:
约分:(1) x^2+2x+1/x^2+x ; (2) 3x-6/x^2-4x+4; (3)ax^2/a+ax
打错了应为::(1) (x^2+2x+1)/(x^2+x) ; (2) (3x-6)/(x^2-4x+4); (3)(ax^2)/(a+ax)
答
(1)(x+1)^2/{x(x=1)}=(x+1)/x
(2) 3(x-2)/(x-2)^2=3/(x+2)
(3) a(x)^2/a(1+x)=x^2/(1+x)