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㎡–2m+1=25 怎么解

m²-m-2=0 (m+1)(m-2)=0 m=-1或m=2

解:(m²-1)(m²+1) =(m²)²-1² =m⁴-1

m1=-3,m2=1

(2㎡–1)(2㎡–2)=(根号2m-1)(根号2m+1)(根号2m-根号2)(根号2m+根号2)

解: (6m²-4m-3)+(2m²-4m+1) =6m²+2m²-4m-4m-3+1 =(6+2)m²-(4+4)m-(3-1) =8m²-8m-2 (6m²-4m-3)+(2m²-4m+1)=8m²-8m-2

x²-4x-3=0 m+n=4 mn=-3 m²-mn+n² =(m+n)²-3mn =16+9 =25

综合单价就是人材机+管理费利润....不考虑的话就这么算267.54*0.01*180/92=5.234,稍微解释下,就是定额单价*工程量/清单工程量,欢迎追问

m(m-4)<0 0<m<4

解:因为a与b互为相反数,c,d,互为倒数,m的绝对值为2, 所以a+b=0 cd=1 m=±2 10m分之(a+b+㎡–cd) =10m分之(0+m²-1) 当m=2时 上式=20分之3 当m= -2时,上式= -20分之3

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