约分:3ax^3-3x^3y/9xy^2-9axy^2
问题描述:
约分:3ax^3-3x^3y/9xy^2-9axy^2
答
3ax³-3x³y/9xy²-9axy²
=3x³(a-y)/9xy²(1-a)
=x²(a-y)/3y²(1-a)