化简:(X2+XY+Y2)2 — 4XY(X2+Y2)请注意:写在字母和括号后面的数字,是它的几次方.
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(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
(x2+2xy+y2)( x2-xy+y2)2 化简
(x2+xy+y2)-4xy(x2+y2)
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/(x2+2xy-3y2)
化简:(X2+XY+Y2)2 — 4XY(X2+Y2)请注意:写在字母和括号后面的数字,是它的几次方.
2(x2-xy)-3(2x2-3xy)-2[x2-(2x2-xy+y2)] 化简.
已知x2+y2=7,xy=-2,求5x2—3xy—4y2—11xy—7x2+2y2的值
-(x2-2xy-y2)+(5x2-2xy-3y2)-(x2-2xy-y2)+(5x2-2xy-3y2)化简
化简(X2+y2-z2-2xy)/(x2-y2+z2-2xy)/(x2-y2-z2+2xy)(x2+y2-z2+2xy)
2(x-xy)-3(2x2-3xy)2[x2(2x2-xy+y2)]
x2-2xy+y2-4分解因式
4x2+3xy-2y2因式分解
计算:(xy-x2)÷xy分之x2-2xy+y2
4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy
x2+y2+2xy=256 x2+y2-2xy=4 (x2,
(x2+xy+y2)-4xy(x2+y2)因式分解
(x2-2xy+y2)-(x2+2xy+y2)=什么
( x2+xy+y2) ( x2+xy+2y2)-12y4