x^2(x-y)^2-4(y-x)^2 回答正确给好评
x^2(x-y)^2-4(y-x)^2 回答正确给好评
x²-2x+y²+6y+10=0求x+y的值.第一个回答的给好评!
【给好评】解方程组 {x+y=7 {x^2+y^2+x+y-32=0
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(x/2-y/2)的平方—1/4(x的平方—y的平方等于多少.给好评
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
x{3x-[(x+2y)-(2x-y)]}+5,求大师们速速回答!要有正确的解题方法!
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(x-y/x+2y)³
化简:(x+y)(x-y)-2(4-y^2+1/2x^2) 赶紧回答吧,
(3x-y)²-2x(4x-5y)-(x+2y)²
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x