16-1/25m^2
答案:2 悬赏:50 手机版
解决时间 2021-01-29 02:04
- 提问者网友：浩歌待明月
- 2021-01-28 12:26
16-1/25m^2
最佳答案
- 五星知识达人网友：痴妹与他
- 2021-01-28 13:02
（1）16-1/25m^2
=4^2-(1/5m)^2
=(4+1/5m)(4-1/5m)
（2）(a+b)²-1
=(a+b+1)(a+b-1)
（3）-(x+2)²+16(x-1)²
=16(x-1)²-(x+2)²
=(4（x-1）)^2-(x+2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
（4）-1/4xy^3+0.01xy
=0.01xy-1/4xy^3
=0.01xy-0.25xy^3
=0.01xy(1-25y^2)
=0.01xy(1+5y)(1-5y)
=4^2-(1/5m)^2
=(4+1/5m)(4-1/5m)
（2）(a+b)²-1
=(a+b+1)(a+b-1)
（3）-(x+2)²+16(x-1)²
=16(x-1)²-(x+2)²
=(4（x-1）)^2-(x+2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
（4）-1/4xy^3+0.01xy
=0.01xy-1/4xy^3
=0.01xy-0.25xy^3
=0.01xy(1-25y^2)
=0.01xy(1+5y)(1-5y)
全部回答
- 1楼网友：孤独的牧羊人
- 2021-01-28 14:20
(2)原式=（a+b+1）（a+b-1)运用平方差公式
(3)原式=16（x-1）²-（x-2）²
=(4x-4)²-(x+2)²
=(5x-2)(3x-6)
=3(5x-2)(x-2)
(3)原式=16（x-1）²-（x-2）²
=(4x-4)²-(x+2)²
=(5x-2)(3x-6)
=3(5x-2)(x-2)
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