(2×y+x²-y²)-(x²-y²-3xy) 计算题,
(2×y+x²-y²)-(x²-y²-3xy) 计算题,
数学计算题(0.3x³+x²y-2xy²)-(0.5x³-2x²y+1
数学计算题(x-y)²(y-x)³
计算题:3xy²÷(6y²/x)(需要过程)
有这样一道计算题:“计算(2x²-3x²y-2xy²)-(x²-2xy²
计算题:(1/3x-3y)²
数学计算题,x²+y²+2x-8y+17=0,求x的2005次方+xy的值
有这样一道题计算题:‘‘计算3x的平方y+(2x²y-【5x²y²-y²】)-5
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)
x²/xy-x/y
一道计算题:(2x^3y^2-3x^2y+4xy^3)/(-2x)/(-y)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)