你可能感兴趣的试题
4x-9x+6x=-x a - a = 0 x3 – x2 = x -4xy - 2xy = -2xy
3x2y与3xy2 3xy与﹣2xy2 ﹣2xy2与﹣2ab2 0与π
﹣3a+4a=﹣7a 4m+2n=6mn 5x+4x=20x2 6xy3﹣2xy3=4xy3
xy(2x-2y)2 2xy(x-y)2 4xy(x2-2xy+y2) 4xy(x-y)2
12xy-4x 12xy-10x 12xy-8x 12xy-2x
3x2y•5xy2=-2x2y -2x2y3•2xy=-2x3y4 28x4y2÷7x3y=4xy (-3a-2)(3a+2)=9a2-4
4x﹣9x+6x=﹣x xy﹣2xy=3xy x3﹣x2=x
﹣2x+3x=x 6xy2÷2xy=3y (﹣2x2y)3=﹣6x6y3 2xy2•(﹣x)=﹣2x2y2
8x2y-24xy2=8xy(x-3y); ax+bx+ay+by=x(a+b)+y(a+b) 12x2y+14x2y2-2xy=2xy(6x+7xy-1); x3-8=(x-2)(x2+2x+4)