3x-(2+3x-6y)=3x-2-3x+6y
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3x-(2+3x-6y)=3x-2-3x+6y
3x-(2+3x-6y)=3x-2-3x+6y
3x-(2+3x-6y)=3x-2-3x+6y
是的,你做的对
3x-(2+3x-6y)=3x-2-3x+6y 去括号后变号,所以对
等于
3x-(2+3x-6y)=3x-2-3x+6y
去掉括号,括号里面的变正负号
3x-2-3x+6y=3x-2-3x+6y
3^x+2x=y,x
因式分解3x^2(x-y)+6x(y-x)
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
x(x-y)2-(y-x)3
求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4)
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40