1.设m^2+m-1=0,则m^3+2*m^2+2009的值是__________.
3个回答
1
∵m²+m-1=0 ①∴m³+m²-m=0 ②
①+② m³+2m²-1=0
∴原式=2010
2
M=3xy² N=6x²
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