分解因式:x3(a 1)−xy(x−y)(a−b) y3(b 1) A. (x2−xy+y2)(ax+by+x+y) B. (x2−xy−y2)(ax+b
During the evolution of vertebrates, the XY and ZW chromosomes developed independently through translocations and fusion/fission rearrangements, generating multiple sex chromosomes1,2,3. In the specific case of reciprocal translocations, sex chromosomes and autosome pairs suffer breaks, and the resulting s...
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分解因式:x3(a+1)-xy(x-y)(a-b)+y3(b+1) 相关知识点: 整式乘除和因式分解 因式分解 公式法 完全平方公式进阶 试题来源: 解析 【解答】解:原式=ax3+x3-x2y(a-b)+xy2(a-b)+by3+y3,=ax3+x3-ax2y+bx2y+axy2-bxy2+by3+y3,=a(x3-x2y+xy2)+b(y3+x2y-xy2)+x3+y3,=ax(x2-...
解答: 解:点(x1,y1),(x2,y2),(x3,y3)差不多上y=﹣的图象上的点, ∴y1=﹣,y2=﹣,y3=﹣, 而x1<023, ∴y321. 故选A. 点评: 本题考查了反比例函数图象上点的坐标特点:反比例函数y=(k为常数,k≠0)的图象是双曲线,图象上的点(x,y)的横纵坐标的积是定值k,即xy=k.反馈...
x3(a+1)-xy(x-y)(a-b)+y3(b+1)=ax^3+x^3-x^2y(a-b)+xy^2(a-b)+by^3+y^3=ax^3+x^3-ax^2ya+bx^2y+axy^2-bxy^2+by^3+y^3=a(x^3-x^2y+xy^2)+b(y^3+x^2y-xy^2)+x^3+y^3=ax(x^2-xy+y^2)+by(x^2-xy+y^2)+(x+y)(x^2-xy+y^2)=(ax+...
19已知 A(x_1,y_1) , B(x_2,y_2) , C(x_3,y_3)x y 1求证:A,B,C三点共线的充要条件是x2 y2 1=0.x3 y3 1
原式=ax3+x3-x2y(a-b)+xy2(a-b)+by3+y3,=ax3+x3-ax2y+bx2y+axy2-bxy2+by3+y3,=a(x3-x2y+xy2)+b(y3+x2y-xy2)+x3+y3,=ax(x2-xy+y2)+by(x2-xy+y2)+(x+y)(x2-xy+y2),=(ax+by+x+y)(x2-xy+y2). 将原多项式展开,按含a、含b的进行分组,同时将剩余的x3+y3分解因...
解答:解:(1)原式=x3(a-b+b+1)-xy(x-y)(a-b)+y3(b+1) =x3(a-b)+x3(b+1)-xy(x-y)(a-b)+y3(b+1) =(x3+y3)(b+1)+[x3-xy(x-y)](a-b) =(x+y)(x2-xy+y2)(b+1)+x(x2-xy+y2)(a-b) =(x2-xy+y2)[(x+y)(b+1)+x(a-b)] ...