是144y^4原式=x^4-24x²y²+144y^4-x²y²=(x²-12y²)²-x²y²=(x²+xy-12y²)(x²-xy-12y²)=(x+4y)(x-3y)(x-4y)(x+3y)谢谢。大神顺便在帮帮忙吧。x(x+1)(x+2)(x+3)+1;48(x+y+z)*2-75(x-y-z)*2;0.125x*3+8y*3再次感谢采纳我，重新问分三个提问