因式分解x^8x^7y+x^6y^2
因式分解x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+......因式分解x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^6-xy^7+y^8 帮帮我哦!!!~
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^6-xy^7+y^8 =(x^8-x^7y+x^6y^2)-(x^5y^3-x^4y^4+x^3y^5)+(x^2y^6-xy^7+y^8) =(x^6-x^3y^3+y^6)(x^2-xy+y^2) 实际原式=(x^9+y^9)/(x+y),但这不是因式分解
因式分解x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^6-xy^7+y^8 =x^6(x^2-xy+y^2)-x^3y^3(x^2-xy+y^2)+y^6(x^2-xy+y^2) =(x^6-x^3y^3+y^6)(x^2-xy+y^2)
答:原式=(x-2y)^2-(x-2y)-6 =(x-2y+2)(x-2y-3).详情>>
答:x^4+4=x^4+4x^2+4-4x^2=(x^2+2x+2)(x^2-2x+2) =(x+1+i)(x+1-i)(x-1+i)(x-1-i)详情>>