x^2+(y+1)x-(3y-2)(2y-3)=(x+3y-2)(x-2y+3) 这个式子怎么从左边变到右边的?不要说的太高深了.其实是分解因式,x^2+xy-6y^2+x+13y-6,参考答案直接变成这样了,怎么变的?原式=x^2+(y+1)x-(6y^2-13y+6)=x^2+(y+1)x-(3
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![x^2+(y+1)x-(3y-2)(2y-3)=(x+3y-2)(x-2y+3) 这个式子怎么从左边变到右边的?不要说的太高深了.其实是分解因式,x^2+xy-6y^2+x+13y-6,参考答案直接变成这样了,怎么变的?原式=x^2+(y+1)x-(6y^2-13y+6)=x^2+(y+1)x-(3](/uploads/image/z/5412521-65-1.jpg?t=x%5E2%2B%28y%2B1%29x-%283y-2%29%282y-3%29%3D%28x%2B3y-2%29%28x-2y%2B3%29+%E8%BF%99%E4%B8%AA%E5%BC%8F%E5%AD%90%E6%80%8E%E4%B9%88%E4%BB%8E%E5%B7%A6%E8%BE%B9%E5%8F%98%E5%88%B0%E5%8F%B3%E8%BE%B9%E7%9A%84%3F%E4%B8%8D%E8%A6%81%E8%AF%B4%E7%9A%84%E5%A4%AA%E9%AB%98%E6%B7%B1%E4%BA%86.%E5%85%B6%E5%AE%9E%E6%98%AF%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%2Cx%5E2%2Bxy-6y%5E2%2Bx%2B13y-6%2C%E5%8F%82%E8%80%83%E7%AD%94%E6%A1%88%E7%9B%B4%E6%8E%A5%E5%8F%98%E6%88%90%E8%BF%99%E6%A0%B7%E4%BA%86%2C%E6%80%8E%E4%B9%88%E5%8F%98%E7%9A%84%3F%E5%8E%9F%E5%BC%8F%3Dx%5E2%2B%EF%BC%88y%2B1%EF%BC%89x-%286y%5E2-13y%2B6%29%3Dx%5E2%2B%EF%BC%88y%2B1%EF%BC%89x-%283)
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x^2+(y+1)x-(3y-2)(2y-3)=(x+3y-2)(x-2y+3) 这个式子怎么从左边变到右边的?不要说的太高深了.其实是分解因式,x^2+xy-6y^2+x+13y-6,参考答案直接变成这样了,怎么变的?原式=x^2+(y+1)x-(6y^2-13y+6)=x^2+(y+1)x-(3
x^2+(y+1)x-(3y-2)(2y-3)=(x+3y-2)(x-2y+3) 这个式子怎么从左边变到右边的?
不要说的太高深了.其实是分解因式,x^2+xy-6y^2+x+13y-6,参考答案直接变成这样了,怎么变的?原式=x^2+(y+1)x-(6y^2-13y+6)=x^2+(y+1)x-(3y-2)(2y-3)……好像是“希望杯”邀请赛试题.
x^2+(y+1)x-(3y-2)(2y-3)=(x+3y-2)(x-2y+3) 这个式子怎么从左边变到右边的?不要说的太高深了.其实是分解因式,x^2+xy-6y^2+x+13y-6,参考答案直接变成这样了,怎么变的?原式=x^2+(y+1)x-(6y^2-13y+6)=x^2+(y+1)x-(3
x的系数 数字项
1 (3y-2)
1 -(2y-3) (交叉相乘)
----------------------------
(3y-2)-(2y-3)=y+1
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x(x-y)2-(y-x)3
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
计算:x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
二元一次方程 :2(x+y)-(x-y)=3 (x+y)-2(x-y)=1
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y
(Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2
(x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1
化简y(x+y)+(x+y)(x-y)-x^2
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x