因式分①5x3y-20xy3;②a2-8a+16.
①5x3y-20xy3,
=5xy(x2-4y2),
=5xy(x+2y)(x-2y);

②a2-8a+16=(a-4)2
練習冊系列答案
相關(guān)習題

同步練習冊答案