计算 x²/(x+y) - (x-y)
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
计算(x²/x+2y)-x+2y-2
计算:(x-y)的5次方(x-y)²(x-y)³
运用乘法公式计算:(1)(x-y)(x+y)-(2x-y)²
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
计算:(x+y)²-4(x+y)(x-y)+4(x-y)²
运用平方差计算..(-x+y)(-x-y)(-x+y)(x+y)
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
计算:①-x·(y-x)³·(x-y)的四次方 ②(x-y)²·(y-x)³·(x-y)的
计算:(xy-x²)×x-y/xy