(y+2)(y-3) 可以化简吗?
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x-y)(x-2y)-(3x-2y)(x-3y)
1.5y+8y-6y=2y-3
[(3x-2y)²-(3x+2y)(3x-2y)]/(2y-3y)
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
微分方程y''-3y'+2y=5,y(0)=1,y'(0)=2求解过程
已知7/3*根号(9y)-y-2y*1/y=-2,求y的值
(-3x+2y)(3x-2y)可以用平方差公式计算吗?
(y^2-3y+2)(y^2+3y-2)=y^2(y+3)(y-3)
已知方程组7x+(n-2)y=4的解可以使等式 5x-2y=m-1 4x-3y=7与3x+2y=1同时成立,求m+