-3(x-y^2)-0.5(2x-4y^2)怎么化简
(-2x+6y)的平方-(3x+2y)(2x-3y)+(-9y)*4怎么化简
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
[3x^2-(x+y)(y-x)][2(-x-y)(y-x)+2x^2+3y^2]怎么化简?
化简求值:2(x-2y)^2-4(x-2y)+(x-2y)^2-3(x-2y),
初二化简求值题[(5x+2y)(3x+2y)+(x+2y)(x-2y)]/4x,其中x=2,y=3
化简求值{(x=2y)(5x-2y)-(3x+2y)(3x-2y)]/4x,其中x=2,y=-1
化简求值:(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.(10x+1
(x+3y-4)(2x-y)
(2x-3y)2-(4y-3x)(3x+4y)怎么做?
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
化简代数式的几道题3(x-1)-(x-5)2(x^2-y^2)-3(x^2-2y^2)(x+y)+3(x-y)-4(x+