2(2-X)方-X(X-2)立方(因式分解)1.(X-1)(X-2)-2(2-X)方(因式分解)2.(X方+X+1)(X方+X+2)-12(因式分解)3.(X-Y)(3X+Y)方+(X+3Y)方(Y-X)(因式分解)4.2X方(X-Y)+2Y方(Y-X)(因式分解)

问题描述:

2(2-X)方-X(X-2)立方(因式分解)
1.(X-1)(X-2)-2(2-X)方(因式分解)
2.(X方+X+1)(X方+X+2)-12(因式分解)
3.(X-Y)(3X+Y)方+(X+3Y)方(Y-X)(因式分解)
4.2X方(X-Y)+2Y方(Y-X)(因式分解)

2(2-X)^2-X(X-2)^3 =2(X-2)^2-X(X-2)^3 =(X-2)^2[2-X(X-2)] =(X-2)^2(2-X^2+2X) =-(X-2)^2(X^2-2X-2) 1.(X-1)(X-2)-2(2-X)^2 =(X-1)(X-2)-2(X-2)^2 =(X-2)[(X-1)-2(X-2)] =(X-2)(X-1-2X+4) =(X-2)(3-X) =-(X-2)(X-3...