(25x^2+15x^3y-20x^4)除以(-5x^2)
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
解方程组X+Y除以2+X—Y除以3=6和4(X+Y)—5(X—Y)=2
【(x+2y)方-(x+y)(3x-y)-5y方】除以2x
[3(x+y)的立方-5(x+y)的平方-2x-2y]除以(x+y)
计算[(3x——2y)(3x+2y)—(x+2y)(5x—2y)]除以4x
[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x
[(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x
为什么3x除以4等于2y除以5就相当于x除以y等于8除以15?
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(5x^4-10x^3y+25x^2y^2)除以(-5x^2)=_____________________
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x
先化简,再求值:[(X+2Y)平方-(X+Y)(3X-Y)-5Y平方]除以(2X)其中X=-2,Y=1/2