因式分解2x∧2-5xy+2y∧2+3x-3y+1

题目

因式分解2x∧2-5xy+2y∧2+3x-3y+1

答案

2x^2-5xy+2y^2+3x-3y+1 =2x^2+(3-5y)x+2y^2-3y+1 =2x^2+(3-5y)x+(1-y)(1-2y) =(x-2y+1)(2x-y+1)