根据2x^-11x-21,分解2(2y+1)^2-22y-32 急!
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解决时间 2021-11-15 05:03
- 提问者网友:欲望失宠
- 2021-11-14 11:49
根据2x^-11x-21,分解2(2y+1)^2-22y-32 急!
最佳答案
- 五星知识达人网友:青尢
- 2021-11-14 12:34
2x^2-11x-21=(2x+3)(x-7)
根据上式,有:
2(2y+1)^2-22y-32
2(2y+1)^2-11(2y+1)-21
=[2(2y+1)+3]·[(2y+1)-7]
=(4y+5)(2y-6)
=2(4y+5)(y-3)
根据上式,有:
2(2y+1)^2-22y-32
2(2y+1)^2-11(2y+1)-21
=[2(2y+1)+3]·[(2y+1)-7]
=(4y+5)(2y-6)
=2(4y+5)(y-3)
全部回答
- 1楼网友:毛毛
- 2021-11-14 16:50
2x^2-11x-21=(2x+3)(x-7)
2(2y+1)^2-22y-32
=2(2y+1)^2-11(2y+1)-21
=[2(2y+1)+3][(2y+1)-7]
=(4y+5)(2y-6)
2(2y+1)^2-22y-32
=2(2y+1)^2-11(2y+1)-21
=[2(2y+1)+3][(2y+1)-7]
=(4y+5)(2y-6)
- 2楼网友:孤独入客枕
- 2021-11-14 15:30
2x^2-11x-21=(2x+3)(x-7),
2(2y+1)^2-22y-32
=2 (2y+1)^2-11(2y+1)+11-32
=2(2y+1)^2-11(2y+1)-21
令x=2y+1,则上式
=【2(2y+1)+3】【(2y+1)-7】
=(4y+5)(2y-6)
=2(4y+5)(y-3)
2(2y+1)^2-22y-32
=2 (2y+1)^2-11(2y+1)+11-32
=2(2y+1)^2-11(2y+1)-21
令x=2y+1,则上式
=【2(2y+1)+3】【(2y+1)-7】
=(4y+5)(2y-6)
=2(4y+5)(y-3)
- 3楼网友:深街酒徒
- 2021-11-14 13:54
2x^-11x-21=(2x+3)(x-7)
2(2y+1)^2-22y-32
=2(2y+1)^2-11(2y+1)-21
=[(2(2y+1)+3](2y+1-7)
=(4y+5)(2y-6)
=2(4y+5)(y-3)
2(2y+1)^2-22y-32
=2(2y+1)^2-11(2y+1)-21
=[(2(2y+1)+3](2y+1-7)
=(4y+5)(2y-6)
=2(4y+5)(y-3)
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