2分解因式: (x)^4+3(x)^3-6(x)^2-3x+2 .

A (x,y)=(x)^3-6(x)^2y-3x(y)^2+2(y)^3 . B (x,y)=(x)^3-6(x)^2y-3x(y)^2+2(y)^3 . C

3.【单选题】求函数=2(x)^3-6(x)^2-18x+7-|||-__ __的极值。（）=2(x)^3-6(x)^2-18x+7-|||-__ __=2(x

分解因式：^4-3(x)^2+2分解因式：

=(x)^2-3x+2

分解因式：(1) (x)^2-7x+3;-|||-__(1) (x)^2-7x+3;-|||-__(1) (x)^2-7x+3;-|||-__分解因式：

分解因式：m({x)^2}-3(m-1)x+2m-3．分解因式：$m{{x}^{2}}-3(m-1)x+2m-3$．

[主观题]解比例。X：3/8=2/3:46/X=2/70.75/1.5=X/6X:0.3=0.4:0.8

线性方程组 ) (x)_(1)+2(x)_(2)-2(x)_(3)=1 2(x)_(1)+4(x)_(2)-4(x)_(3)=2 3(x)_(1)+6(x)_

求下列极限：(1)lim _(xarrow 1)dfrac ({x)^2+x-2}({x)^2-3x+2}；(2)lim _(xarrow 1)dfrac ({

1.求下列函数的极值:-|||-(1) =2(x)^3-6(x)^2-18x+7 ;-|||-(2) =x-ln (1+x) ;-|||-(3) =-(x)^4