计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
(x+y)^2-(3x-2y)^2计算
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
计算:(-x-2y) * (3x-y)
计算:(x-y)m(y-x)2m+(y-x)3m.
利用因式分解计算1/2x(x-y)^2-1/5y(x-y)
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算:(2x+5y)(3x-2y)-2x(x-3y)