2x^2+xy-4y^2 因式分解_数学解答

2x^2+xy-4y^2 因式分解

人气：273 ℃　时间：2019-12-01 10:31:33

解答

=2x^2+xy+1/8y^2-33/8y^2
=(根号2x+根号2/4y)^2-33y^2/8
=(根号2x+根号2y/4+根号66y/4)(根号2x+根号2y/4-根号66y/4)