帮忙做四道因式分解(1)x^3+2x^2-5x-6(2)4x^3-31x+15(3)(ax-by)^3+(by-cz)^3-(ax-cz)^3(4)证明:对任何整数x和y,下面所给式子的值不会等于33x^5+3x^4y-5x^3y^2-15x^2y^3+4xy^4+12y^5
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 15:36:59
![帮忙做四道因式分解(1)x^3+2x^2-5x-6(2)4x^3-31x+15(3)(ax-by)^3+(by-cz)^3-(ax-cz)^3(4)证明:对任何整数x和y,下面所给式子的值不会等于33x^5+3x^4y-5x^3y^2-15x^2y^3+4xy^4+12y^5](/uploads/image/z/14465571-51-1.jpg?t=%E5%B8%AE%E5%BF%99%E5%81%9A%E5%9B%9B%E9%81%93%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%281%29x%5E3%2B2x%5E2-5x-6%282%294x%5E3-31x%2B15%283%29%28ax-by%29%5E3%2B%28by-cz%29%5E3-%28ax-cz%29%5E3%284%29%E8%AF%81%E6%98%8E%EF%BC%9A%E5%AF%B9%E4%BB%BB%E4%BD%95%E6%95%B4%E6%95%B0x%E5%92%8Cy%2C%E4%B8%8B%E9%9D%A2%E6%89%80%E7%BB%99%E5%BC%8F%E5%AD%90%E7%9A%84%E5%80%BC%E4%B8%8D%E4%BC%9A%E7%AD%89%E4%BA%8E33x%5E5%2B3x%5E4y-5x%5E3y%5E2-15x%5E2y%5E3%2B4xy%5E4%2B12y%5E5)
xQMO@;)
'4e) RDD J3;-Nrzeyo2,OA؆&T(2S
&HȚ$ %9&-Dr Dtîz0_w"<3RܯofG+/9kEK7xЋf5t5nf(
¦:L]RY;+OBJ%'t!WyïQ$YT"HQD<'P~6QӠap5Ti@ J<Um 6FP.zXmqs^ӨƱ}Byרa^|=Tڃ]$>/NV? q
帮忙做四道因式分解(1)x^3+2x^2-5x-6(2)4x^3-31x+15(3)(ax-by)^3+(by-cz)^3-(ax-cz)^3(4)证明:对任何整数x和y,下面所给式子的值不会等于33x^5+3x^4y-5x^3y^2-15x^2y^3+4xy^4+12y^5
帮忙做四道因式分解
(1)x^3+2x^2-5x-6
(2)4x^3-31x+15
(3)(ax-by)^3+(by-cz)^3-(ax-cz)^3
(4)证明:对任何整数x和y,下面所给式子的值不会等于33
x^5+3x^4y-5x^3y^2-15x^2y^3+4xy^4+12y^5
帮忙做四道因式分解(1)x^3+2x^2-5x-6(2)4x^3-31x+15(3)(ax-by)^3+(by-cz)^3-(ax-cz)^3(4)证明:对任何整数x和y,下面所给式子的值不会等于33x^5+3x^4y-5x^3y^2-15x^2y^3+4xy^4+12y^5
(1)原式=x^3+x^2+x^2-5x-6
=x^2(x+1)+(x-6)(x+1)
=(x+1)(x^2+x-6)
=(x+1)(x-2)(x+3)
(2)原式=(x+3)(2x-1)(2x-5)提示加12x^2再减去
(3)提示:换元,看成一个整体
(4)太烦了不高兴写了留给你自己思考吧