约分a+b/a^3-ab^2如图

问题描述:

约分a+b/a^3-ab^2
如图

=(a+b)/a(a+b)(a-b)
=1/a(a-b)
=1/(a²-ab)

约分a+b/a^3-ab^2
=a+b/a(a^2-b^2)
=(a+b)/a(a+b)(a-b)
=1/a(a-b)

(a+b)/(a^3 - a(b^2))
= (a+b)/(a)(a^2 - b^2)
= (a+b)/(a)(a+b)(a-b)
= 1/a^2-ab