化简式子7.4X+5.5X,9.5Y-(7Y-3.3Y),3.2X-X+6
化简式子7.4X+5.5X,9.5Y-(7Y-3.3Y),3.2X-X+6
因式分解下列式子:x(x-y)+y(y-x)=?
化简求值(选择题)⒈式子-3x^2·y-10x^3+3x^3+6x^3·y+3x^2·y-6x^2·y-6x^3·y+7
{(x,y) |x|+|y|
x>y?x:y
已知x、y满足|x-6|+根号5-y=0,求式子(y-x)2013次
3(2x^2-y^2)-(3x^2-2y^3)化简此式子!
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y
化简求值:(7x-2y)(3x-2y-1)-(4x+3y)(9x+6y),其中x=2,y=-1
已知x*x-4x+4与y-1的绝对值互为相反数,则式子(x/y-y/x)/(x+y)的值等于
化简求值 -3(2x-y)-{7x-〔6x+2x-(10x-8y)〕-x-2(3x-4y)}