y(x+y)+(x+y)(x-y)-x² 提公因式 1.y(x+y)+(x+y)(x-y)-x的平方2.x(b+c-d)-y(d-b-c)-2c+2d-2b3.2(a-3)平方-a+34.6a(b-a)平方-2(a-b)立方5.x(b+c-d)-y(d-b-c)-2c+2d-2b6.不解方程组2x+y=6 求代数式7y(x-3y)平方-2(3y-x)立方 x-3y=1
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![y(x+y)+(x+y)(x-y)-x² 提公因式 1.y(x+y)+(x+y)(x-y)-x的平方2.x(b+c-d)-y(d-b-c)-2c+2d-2b3.2(a-3)平方-a+34.6a(b-a)平方-2(a-b)立方5.x(b+c-d)-y(d-b-c)-2c+2d-2b6.不解方程组2x+y=6 求代数式7y(x-3y)平方-2(3y-x)立方 x-3y=1](/uploads/image/z/6945594-42-4.jpg?t=y%28x%2By%29%2B%28x%2By%29%28x-y%29-x%26sup2%3B+%E6%8F%90%E5%85%AC%E5%9B%A0%E5%BC%8F+1.y%28x%2By%29%2B%28x%2By%29%28x-y%29-x%E7%9A%84%E5%B9%B3%E6%96%B92.x%28b%2Bc-d%29-y%28d-b-c%29-2c%2B2d-2b3.2%EF%BC%88a-3%EF%BC%89%E5%B9%B3%E6%96%B9-a%2B34.6a%28b-a%29%E5%B9%B3%E6%96%B9-2%28a-b%29%E7%AB%8B%E6%96%B95.x%28b%2Bc-d%29-y%28d-b-c%29-2c%2B2d-2b6.%E4%B8%8D%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%842x%2By%3D6+%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F7y%28x-3y%29%E5%B9%B3%E6%96%B9-2%EF%BC%883y-x%EF%BC%89%E7%AB%8B%E6%96%B9+x-3y%3D1)
y(x+y)+(x+y)(x-y)-x² 提公因式 1.y(x+y)+(x+y)(x-y)-x的平方2.x(b+c-d)-y(d-b-c)-2c+2d-2b3.2(a-3)平方-a+34.6a(b-a)平方-2(a-b)立方5.x(b+c-d)-y(d-b-c)-2c+2d-2b6.不解方程组2x+y=6 求代数式7y(x-3y)平方-2(3y-x)立方 x-3y=1
y(x+y)+(x+y)(x-y)-x² 提公因式
1.y(x+y)+(x+y)(x-y)-x的平方
2.x(b+c-d)-y(d-b-c)-2c+2d-2b
3.2(a-3)平方-a+3
4.6a(b-a)平方-2(a-b)立方
5.x(b+c-d)-y(d-b-c)-2c+2d-2b
6.不解方程组2x+y=6 求代数式7y(x-3y)平方-2(3y-x)立方
x-3y=1 求代数式的值
y(x+y)+(x+y)(x-y)-x² 提公因式 1.y(x+y)+(x+y)(x-y)-x的平方2.x(b+c-d)-y(d-b-c)-2c+2d-2b3.2(a-3)平方-a+34.6a(b-a)平方-2(a-b)立方5.x(b+c-d)-y(d-b-c)-2c+2d-2b6.不解方程组2x+y=6 求代数式7y(x-3y)平方-2(3y-x)立方 x-3y=1
1.(x+y)x-x2=x(x+y-x)=xy
2.xb+xc-xd-yd+yb+yc-2c+2d-2b=(x+y-2)(b-d+c)
3.(a-3)(2a-7)
4.(a-b)平方(4a+2b)
5.(x+y-2)(b+c-d)
6.化为(3y-x)平方(y+2x)则(-1)平方*6=6
1:原式=yx+y2+x2-y2-x2=xy
其他都一样,很简单