化简 3/1(9y-3)+2(y+1)
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化简 3/1(9y-3)+2(y+1)
化简 3/1(9y-3)+2(y+1)
化简 3/1(9y-3)+2(y+1)
0.33(9y-3)+2(y+1)
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
y (3y^2+8y-3)-6y(3y+2y-1)+9y
化简 3/1(9y-3)+2(y+1)
化简((X-2Y)的平方+(X-Y)(x+Y)-2(X-3Y)(X-Y))除以Y
把(x-y),(a+b)作为一个因式,合并同类项:3(x-y)-9(x-y)-8(x-y)+6(x-y)-1
3(Y+1)^2-5(Y+1)(Y-1)+2(Y-1)^2,化简
已知y满足(y+1)/2-y>2+(y+2)/3,化简|y+1|+|2y-1|的结果是 A.-3y b.3y c.y d.-y+2
通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9
y平方-3y+1=0,则(y四次方+1)除以y平方是多少?
已知7/3*根号(9y)-y-2y*1/y=-2,求y的值
解(y-3分之2y+y+3分之y)×y分之y²-9
3y(y-1)等于2(y-1)
化简:(x+y)+(2x+y/1*2)+(3x+y/2*3)+...+(9x+y/8*9)
已知x+y=-2,试计算1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y的值
计算:(1)y/4x²y-1/12y²;(2)2/x+y-x+3/x+y(3)a²/a+3-9/a+3
½×(y-1)+⅓×(y-2)+¼(y-3)+3=0得数
化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0) y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)化简:7y/2x*根号下(1/y^2)-(x/y^3) 且(y>x>0)y/(3x-y)*根号下(9x^3y-6x^2y^2+xy^3)/y^2 且(3x>y>0)