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(1).x^2-8xy+7y^2(2).4x^2+9xy+2y^2(3).2x^2+7xy+3y^2(4).6x^2+xy-2y^2

分类: 作业答案 • 2022-02-27 11:17:00
问题描述：

(1).x^2-8xy+7y^2
(2).4x^2+9xy+2y^2
(3).2x^2+7xy+3y^2
(4).6x^2+xy-2y^2

答

1 x^2-8xy+7y^2=(x-y)(x-7y)
2 4x^2+9xy+2y^2=(4x+y)(x+2y)
3 2x^2+7xy+3y^2 =(2x+y)(x+3y)
4 6x^2+xy-2y^2=(3x+2y)(2x-y)

答

(x-y)(x-7y)
(4x+y)(x+2y)
(2x+y)(x+3y)
(3x+2y)(2x-y)

答

(1).x^2-8xy+7y^2 =（x-y)(x-7y)
(2).4x^2+9xy+2y^2 =(4x+y)(x+2y)
(3).2x^2+7xy+3y^2 =(2x+y)(x+3y)
(4).6x^2+xy-2y^2=(2x-y)(3x+2y)

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