1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.2.若ax²-3x-18=(2x-3)(kx+6),则a=______,k______.3.多项式x-1与2-kx的乘积不含x的一次式,则k=______.4.计算:(1)2x²-x(2x-y)-y(2x-y).(2)(3+2a-b)(3-2a+b).5.解方程:(x+
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![1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.2.若ax²-3x-18=(2x-3)(kx+6),则a=______,k______.3.多项式x-1与2-kx的乘积不含x的一次式,则k=______.4.计算:(1)2x²-x(2x-y)-y(2x-y).(2)(3+2a-b)(3-2a+b).5.解方程:(x+](/uploads/image/z/2576868-60-8.jpg?t=1.%E8%8B%A5x%3D2%2Cy%3D1%2C%E5%88%99%EF%BC%88x-y%EF%BC%89%EF%BC%88x%26sup2%3B%2Bxy%2By%26sup2%3B%EF%BC%89%3D______.2.%E8%8B%A5ax%26sup2%3B-3x-18%3D%282x-3%29%28kx%2B6%29%2C%E5%88%99a%3D______%2Ck______.3.%E5%A4%9A%E9%A1%B9%E5%BC%8Fx-1%E4%B8%8E2-kx%E7%9A%84%E4%B9%98%E7%A7%AF%E4%B8%8D%E5%90%ABx%E7%9A%84%E4%B8%80%E6%AC%A1%E5%BC%8F%2C%E5%88%99k%3D______.4.%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%881%292x%26sup2%3B-x%282x-y%29-y%282x-y%29.%282%29%283%2B2a-b%29%283-2a%2Bb%29.5.%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A%28x%2B)
1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.2.若ax²-3x-18=(2x-3)(kx+6),则a=______,k______.3.多项式x-1与2-kx的乘积不含x的一次式,则k=______.4.计算:(1)2x²-x(2x-y)-y(2x-y).(2)(3+2a-b)(3-2a+b).5.解方程:(x+
1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.
2.若ax²-3x-18=(2x-3)(kx+6),则a=______,k______.
3.多项式x-1与2-kx的乘积不含x的一次式,则k=______.
4.计算:(1)2x²-x(2x-y)-y(2x-y).
(2)(3+2a-b)(3-2a+b).
5.解方程:(x+3)(x-4)-2x=x²-15.
9.某小区有一长方形的绿地,现在将其规划成一块正方形绿地,将其宽增加2米,长减少2米,就可使其面积圹大为原来的3倍,则这块绿地原来的面积有多大?
1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.2.若ax²-3x-18=(2x-3)(kx+6),则a=______,k______.3.多项式x-1与2-kx的乘积不含x的一次式,则k=______.4.计算:(1)2x²-x(2x-y)-y(2x-y).(2)(3+2a-b)(3-2a+b).5.解方程:(x+
9=2 5=1 4.2=9-4a方+4ab-b方 4=y方-xy 3=-2 2太墨迹了 不写了 1=7 太麻烦了 用键盘我连平方都不回打 (还一点分都不给!) 无聊做了几个
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若x+y=1,x不等于0则x+(2xy+y^2)/x/(x+y)/x=
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若x / x-y = 1/2,则x/y等于( )若x / x-y = 1/2,则x/y等于( )
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若2x=3y,则(x*x+y*y)/x*x=?
若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
若变量X,Y满足X-2Y+1《=0,2X-Y》=0,X《=1.则点P(2-.+有)表示的区域面积为?若变量X,Y满足X-2Y+1《=0 2X-Y》=0 X《=1 则点P(2X-Y,X=Y)表示的区域面积为?