x^4+x²y²+y^4=x^4+2x²y²+y^4-x²y²=(x²+y²)²-(x²y²)=(x²+xy+y²)(x²-xy+y²)注:x^4表示x的四次方以后记得说清楚是要因式分解
是因式分解吧(x-y)的平方减去(x-y)的四次方=[(x-y)-(x-y)^2]x[(x-y)+(x-y)^2]=(x-y)(1-x+y)(x-y)(1+x-y)满意请采纳。