[题目]因式分解-|||-(1) 4a(x-3)+2b(3-x)-|||-(2) ^4-18(x)^2+81-|||-(3) ((1-b))^3+2((b-1))^2

已知矩阵A= 3 -1 2 ,B= 3 -2B=( ) 2-|||-0 4 1 , -3 -4 0 ，则A= 3 -1 2 ,B= 3 -2B=( )

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

[题目]计算-|||-(1) (2x+1)(x+3) ;-|||-(2) (m+2n)(3n-m) ;-|||-(3) ((a-1))^2 ;-|||-(4)

计算：（1）（5a+4c+7b）+（5c-3b-6a）；（2）（8xy-x2+y2）-（x2-y2+8xy）；（3）（(1)/(3)(x^2)-1+3x）-4（

) (x)_(1)+4(x)_(2)-2(x)_(3)+8(x)_(4)=2 -(x)_(1)+2(x)_(2)+3(x)_(3)+4(x)_(4)=1 (x)

((X)_(1)+(X)_(2)+(X)_(3))/3 b.X1-|||-c. ((X)_(1)+(X)_(2))/2 d. (2(X)_(1)+(X)_(2)

mx2-3（m-1）x+2m-3因式分解为 ____ ．mx2-3（m-1）x+2m-3因式分解为 ____ ．

关于方程组_(1)-2(x)_(2)+3(x)_(3)-4(x)_(4)=4 _(1)-2(x)_(2)+3(x)_(3)-4

曲线 =(x-1)((x-2))^2((x-3))^3((x-4))^4 的拐点是 () .-|||-(A)(1,0) (B)(2,0) (C)(3,0) (D

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)_