a的3次+8b的三次 m的5次-1
急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急!!!!!!
今晚要的,8点半
^æ¯å¥ææ 帮å¿è§£éä¸ä¸
追çæ¯æ¬¡æ¹çææ
^4å°±æ¯4次æ¹
thank you!!!
追çä¸å®¢æ°
(x+y)(x的2次-xy+y的2次)
(x+y)(x的2次-xy+y的2次)=x^3+y^3 a的3次+8b的三次=(a+2b)(a^2+4b^2-2ab)m的5次-1=(m-1)(m^4+m^3+m^2+m+1)
(x+y)(x^2-xy+y^2) 计算
原式等于:x³-y³这个是立方差公式
(x+y)(x2-xy+y2)
解:原式=(x+y)[(x-y)²+xy]=(x²-y²)(x-y)+x²y+xy²=x³-x²y-xy²+y³+x²y+xy²(-x²y-xy²+x²y+xy²抵消掉)=x³+y³希望对你有帮助哦~祝学习进步哦~\\(^o^)\/ ...
计算:(X+Y)(X^2-XY+Y^2)
(X+Y)(X^2-XY+Y^2)=(x*x^2-x*xy+x*y^2)+(x^2y-xy^2+y^3)=x^3+y^3 这个是立方和的公式,再给你一个 x^3-y^3=(X-Y)(X^2+XY+Y^2)这是立方差的公式
(x+y)(x^2-xy+y^2)
x^3+y^3=(x+y)(x^2-xy+y^2)这是个公式
(x+y)(x的平方-xy+y的平方) 等于多少
(x+y)(x的平方-xy+y的平方)=x^3+y^3
因式分解 (x+y)(x^2-xy-y^2)
(x+y)(x^2-xy-y^2)=(x+y)[(x^2-xy+y^2)-2y^2]=(x+y)(x^2-xy+y^2)-(x+y)*2y^2 =x^3+y^3-2xy^2-2y^3 =x^3-2xy^2-y^3
(x+y)(x^2-xy+y^2)要因式分解全过程!可追加分!
原式=x^3-y*x^2+x*y^2+y*x^2-x*y^2+y^3=x^3+y^3 望采纳。。。
化简:(x+y)(x2-xy+y2)
化简:(x+y)(x2-xy+y2)解:原式= :(x+y)(x2-xy+y2)=x*x^2-x*xy+xy^2+x^2y-xy^2+y^3 =x^3+y^3+(1-1)x^2y+(1-1)xy^2 =x^3+y^3 这个是立方和公式 立方差公式是:x^3-y^3 =(x-y)*(x^2-xy+y^2)
急求解 (x+y)(x^2-xy+y^2)-xy(x+y)
求值: (x+y)(x^2-xy+y^2)-xy(x+y)=x^3-+y^3-x^2y-xy^2 分解因式(x+y)(x^2-xy+y^2)-xy(x+y)=(x+y)(x-y)^2