因式分解7x^2-3y+xy-21x

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 05:02:32
因式分解7x^2-3y+xy-21x
x){:{=O;^,_l^gk\]QkdXaTOZΆ~ 5eCs k4a[8P"@1ԄԮSP &P6P~qAb]6`vE!C$Y6"@6Ѡi g

因式分解7x^2-3y+xy-21x
因式分解7x^2-3y+xy-21x

因式分解7x^2-3y+xy-21x
7x²-3y+xy-21x
=7x²-21x-3y+xy
=(7x²-21x)+(xy-3y)
=7x(x-3)+y(x-3)
=(x-3)(7x+y)

7x^2-3y+xy-21x
=(7x^2-21x)+(-3y+xy)
=7x(x-3)+y(x-3)
=(7x+y)(x-3)

7x^2-3y+xy-21x
=(7x^2-21x)+(-3y+xy)
=7x(x-3)+y(x-3)
=(7x-y)(x-3)