-(4/9)x2+4/3xy+y2
(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
已知2x2+xy=6,3y2+2xy=9,求4x2+8xy+9y2的值为______.
已知2x-3*根号(xy)-2y=0(x>0),则x2+4xy-16y2除以2x2+xy-9y2的值是多少?
已知x2-xy=-3,2xy-y2=-8,求2x2+4xy-3y2的值.
如果M=3x2-2xy-4y2,N=4x2+5xy-y2,则8x2-13xy-15y2等于( )
已知6x2减去xy减去15y2等于0,求分式2x2减去3xy减去3y2分之x2减去2xy+4y2
已知x2+y2=7,xy=-2,求5x2—3xy—4y2—11xy—7x2+2y2的值
已知x2+y2 =7,xy=-2.求5x2 -3xy-4y2 -11xy-7x2 +2y2
已知X2+y2=7,Xy=-2,求多项式5X2一3Xy-4y2-11Xy-7X2+2y2的值.
已知:x2+y2=7,xy=-2.求7x2-3xy-2y2-11xy-5x2+4y2的值.
解一个二元二次方程x2-4xy+3y2=0x2=10-y2
-4x2+3xy+2y2 因式分解怎么解