化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1详细解答!
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 22:42:17
化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1详细解答!化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=
化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1详细解答!
化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1
详细解答!
化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1详细解答!
2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y)
=2(x+y) -3(x+y)-2/3(x-y) +2/3(x-y)
=-(x+y)
当x=-2,y=1时
原式=-(-2+1)=1
原式=[2(x+y)-3(x+y)]+[-2/3(x-y)+2/3(x-y)]
=-(x+y)
=-x-y
=2-1
=1
2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y)
=(2-3)(x+y)+(-2/3+2/3)(x-y)
=-(x+y)
=-x-y
=-(-2)-1
=2-1
=1
原式=2(x y)-3(x y)=-x-y=1
-(x+y)=1
2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y)
=(2-3)(x+y)+[(2/3)-(2/3)](x-y)
=(-1)(x+y)+0
=-(x+y)
=-x-y
=-(-2)-1
=2-1
=1
化简并求值:2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y=1详细解答!
化简并求值“2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=12,y-1
化简并求值:(x+2y)(2x+y)-(3x-y)(x+2y),其中X=9,Y=二分之一
化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y) 其中x=2,y化简下列各式,并求值:3(x-y)²-7(x-y)+8(x-y)²+6(x-y)其中x=2,y=5
化简并求值2(x^2y+xy)-3(x^2y+xy)-4x^2y,其中x=-2,y=1/2
4(x²+y)(x²-y)-(2x²-y)^2,其中x=2,y=-3化简并求值,一定要具体
x(x+y)-(x-y)(x+y)-y^2,其中x=(1/4)的2010次方,y=4的2011次方化简并求值
(3x+2y-1)(3x-2y+1)-(x+y)(x-y)化简求值其中,x=三分之一 y=二分之一 化简求值
化简求值(2x+3y)平方-( 2x+y)(2x-y)
化简并求值:4x ³(-y ³)² -3x 乘(-x)²(-y²)³ 其中x=-3 y=-2
[3x/2-x+y/2(3x/x+y-x-y)]÷x/x-y,其中5x+3y=0.化简并求值.明天交的!
化简求值 [(x-y^2)+(x+y)(x-y)]÷2x.[(x-y^2)+(x+y)(x-y)]÷2x.化简求值 x=3 y=1.5
化简求值(3x+2y-1)(3x-2y+1)-(x+y)(x-y)
化简化简并求值 x=2 y=90(x+y)+(2x+y/2)+(3x+y/2*3)+(4x+y/3*4)+.+(8x+y/8*9)(x+y)+(2x+y/2)+(3x+y/2*3)+(4x+y/3*4)+....+(9x+y/8*9) 对不起 后面是9 ,打错了
化简并求值2(2x-3y)-3(4x+2y-1),其中x=2,y=0.5
3(x-2y)-2(3x-y)化简并求值 其中当x=-1,y=二分之一
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,y=-2
已知(x-2)²|y+1|=0,求值并化简-9y+6x²+3(y-三分之二x²)