m²-3m 2 m²-m,其中m=92
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原式=9-m2+m2-6m-7=-6m+2=-6*1/2+2=-1
m平方+4m-3m平方-5m+6m平方-2=4m^2-m-2当m=-3/2,原式=4*9/4+3/2-2=17/2
原式=m(m+3)(m-3)-m(m-2)²=m(m²-9)-m(m²-4m+4)=m(m²-9-m²+4m-4)=m(4m-13)=4m²
原式为:m²(m+4)+2m(m²-1)-3m³=m³+4m²+2m³-2m-3m³=4m²-2m=2m(2m-1)再将
m³-2m²+m/m³-m=㎡-2m+1/㎡-1=(m-1)²/(m-1)(m+1)=m-1/m+1=2000/2002=1000/1001
∵m=2-√3∴m-1>0(m^2-1)/(m+1)-[m√(m^2-2m+1)]/(m^2-m)=[(m+1)(m-1)]/(m+1)-[m√(m-1)²]/[m(m-1)]=(m-1)-
带入可得(9+6+1/9-1+9+1)*(-2)=-434/9再问:能写一下过程吗?再答:带入得(9+6+1/9-1+9+1)÷(1-3/2)=(24+1/9)÷(-1/2)=(217/9)×(-2)
原题可化简为m-1/m+1.过程m^3-2m^2+m/m^3-m=m(m^2-2m+1)/m(m^2-1),m消掉.=(m^2-2m+1)/(m^2-1)=(m-1)(m-1)/(m+1)(m-1),
m³-2m²+m/m³-m=㎡-2m+1/㎡-1=(m-1)²/(m-1)(m+1)=m-1/m+1=2000/2002=1000/1001
原式是不是这样:(m³-2m²+m)/(m³-m)如果对了,就这样化简:{m(m²-2m+1)}/{m(m²-1)}=(m²-2m+1)/(
(m^3-2m^2+m)/(m^3-m)=(m^2-2m-1)/(m^2-1)=(m-1)^2/(m-1)(m+1)=(m-1)/(m+1)=2010/2012
yarandewo:(3+m)(3-m)+m(m-6)-7=9-m²+m²-6m-7=9-6m-7=2-6m∴当m=1/2时,原式=2-6×(1/2)=2-3=-1
答:(m-2)(m²+2m+4)-2m(m²-3)=m³+2m²+4m-2m²-4m-8-2m³+6m=-m³+6m-8=-2
m(m-3)-(m+3)(m-3)=(m-3)(m-m-3)=-3(m-3)=-3(-4-3)=21
原式={[3m(m-2)-m(m+2)]/(m+2)(m-2)}/[2m/(m²-4)]=[(3m²-6m-m²-2m)/(m²-4)]/[2m/(m²
=3m^2-m-m^2+9+2(m^2-2m+1)=-5m+11将m=2代入,得:-10+11=1则原代数式值为1.
3(m+1)^2-5(m+1)+2(m-1)^2=(m+1)[3(m+1)-5]+2(m-1)^2=(m+1)[3m+3-5]+2(m-1)^2=(m+1)(3m-2)+2(m-1)^2=(-5+1)
m(3m-1)-(m+3)(m-3)-2(m-1)^2=3m^2-m-(m^2-9)-2(m^2-2m+1)=3m^2-m-m^2+9-2m^2+4m-2=3m^2-m^2-2m^2-m+4m-2+9
我怀疑你少一个平方m/(m+3)-6/(m-9)÷2/(m-3)=m/(m+3)-6/(m+3)(m-3)×(m-3)/2=m/(m+3)-3/(m+3)=(m-3)/(m+3)当m=-2时原式=(-