(y+z)(x+y)(x﹣z) 相关知识点: 试题来源: 解析 [解答]解:x2y﹣y2z+z2x﹣x2z+y2x+z2y﹣2xyz =(y﹣z)x2+(z2+y2﹣2yz)x+z2y﹣y2z =(y﹣z)x2+(y﹣z)2x﹣yz(y﹣z) =(y﹣z)[x2+(y﹣z)x﹣yz] =(y﹣z)(x+y)(x﹣z). 故选:A.反馈 收藏 ...
(y+z) (x-y) (x+z) D. (y+z) (x+y) (x- z) [解答] 解:x2y— y2z+z2x— x2z+y2x+z2y— 2xyz =(y-z) x2+ (z2+y22、2z =(y - z) x2+ (y- z) 2x- yz (y - z) =(y-z) [x2+ (y - z) x-yz] =(y-z) (x+y) (x-z). 故选:A....
多项式x2y-y2z+z2x-x2z+y2x+z2y-2xyz因式分解后的结果是( ) A.(y-z)(x+y)(x-z) B.(y-z)(x-y)(x+z) C.(y+z)(x-y)(x+z) D.(y+z)(x+y)(x-z) 多项式x²y+y²x²+x²z-2xyz+x²y因式分解结果为 因式分解 x^2(y+z)+y^2(z+x)+z^2(x+y)-(x^3+y...
x^2y-y^2z+z^2x-x^2z+y^2x+z^2y-2xyz=(x2y-x2z)+(z2y-y2z)+=x2(y-z)-yz(y-z)+=(y-z)(x2-yz)+x(y2-2yz+z2)=(y-z)(x2-yz)+x(y-z)(y-z)=(y-z)(x2-yz+xy-xz)分组分解法,只是分组有点难,主要是寻找与公式有关的项分到一组... 解析看不懂?免费查看同类题视频...
已知x,y,z都是,代数式x2y-y2z+z2x-x2z+y2x+z2y-2xyz的值是质数,则zx+y的值是( ).A.0.B.1.C.2.D.4.的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是学习的生产
3.因式分解:x2y-y2z+z2x-x2z+y2x+z2y-2xyz. 相关知识点: 试题来源: 解析 将原式重新整理成关于x的二次三项式 原式=(y-z)x2+(y2-2yz+z2)x-(zy2-z2y)=(y-z)x2+(y-z)2x-zy(y-z) =(y-z)[x-+(y-z)x-yz]=(y-z)(x+y)(x-z). ...
用主元法分解因式:(1)x2y−y2z+z2x−x2z+y2x+z2y−2xyz.(2)x2y−y2z+z2x−x2z+y2x+z2y−2xyz. 答案 (1)(y夜zs(x+y子(x−z表.hal尽y−z)(x+容)s数−zs.相关推荐 1用主元法分解因式:(1)x2y−y2z+z2x−x2z+y2x+z2y−2xyz.(2)x2y−y2z+...
∴(x+z-2y)2=0,∴z+x-2y=0.故选D. 首先将原式变形,可得x2+z2+2xz-4xy+4xz+4y2-4yz=0,则可得(x+z-2y)2=0,则问题得解. 本题考点:完全平方公式. 考点点评:此题考查了完全平方公式的应用.解题的关键是掌握:x2+z2+2xz-4xy+4y2-4yz=(x+z-2y)2. 解析看不懂?免费查看同类题视频解析查看...
Answer to: Find the gradient of the field E (x, y, z) = x2y-y2z at (1,1,1). What is your observation of the result? By signing up, you'll get...
解答:解:∵x+y+z=2,两边平方得, x2+y2+z2+2xy+2yz+2xz=4, ∵x2+y2+z2=16, ∴xy+yz+xz=-6, 又∵z=2-x-y, ∴ 1 xy+2z = 1 xy+4-2x-2y = 1 (x-2)(y-2) , 同理得, 1 yz+2x = 1 (y-2)(z-2) , 1 zx+2y ...