求解:分解因式!怎么做?要过程!在线等!
1:(X²+2X)²+2(X²+2X)+12:(XY+1)(X+1)(Y+1)+XY3:2X²+2X+(1/2)4:(a-b)(3...
1:(X²+2X)²+2(X²+2X)+1
2:(XY+1)(X+1)(Y+1)+XY
3:2X²+2X+(1/2)
4:(a-b)(3a+b)²+(a+3b)²(b-a) 展开
2:(XY+1)(X+1)(Y+1)+XY
3:2X²+2X+(1/2)
4:(a-b)(3a+b)²+(a+3b)²(b-a) 展开
展开全部
1:(X²+2X)²+2(X²+2X)+1=(X²+2X+1)^2=(x+1)4
2:(XY+1)(X+1)(Y+1)+XY
3:2X²+2X+(1/2)=2(x2+x+1/4)=2)x+1/2)^2
4:(a-b)(3a+b)²+(a+3b)²(b-a)=(a-b)[(3a+b)²-(a+3b)²]=8(a-b)²(a+b)
2:(XY+1)(X+1)(Y+1)+XY
3:2X²+2X+(1/2)=2(x2+x+1/4)=2)x+1/2)^2
4:(a-b)(3a+b)²+(a+3b)²(b-a)=(a-b)[(3a+b)²-(a+3b)²]=8(a-b)²(a+b)
追问
第二题过程!写完就给分!
追答
2:(XY+1)(X+1)(Y+1)+XY=x2y2+x2y+xy2+2xy=xy(xy+x+y+2)
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