1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.2.已知x≠y,x²-x=5,y²-y=5,求x+y的值.3.k为何值时,x²-4xy+4y²-10x+20y+k²+9是一个完全平方式?4.已知x+y+z=m,xy+yz+xz=n,xyz=p,用含m、n、p的代数式表示(
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![1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.2.已知x≠y,x²-x=5,y²-y=5,求x+y的值.3.k为何值时,x²-4xy+4y²-10x+20y+k²+9是一个完全平方式?4.已知x+y+z=m,xy+yz+xz=n,xyz=p,用含m、n、p的代数式表示(](/uploads/image/z/760861-37-1.jpg?t=1.%E5%B7%B2%E7%9F%A5x%E2%89%A02y%2Cx%26%23178%3B-x%3D4y%26%23178%3B-2y%2C%E6%B1%82x%2B2y%E7%9A%84%E5%80%BC.2.%E5%B7%B2%E7%9F%A5x%E2%89%A0y%2Cx%26%23178%3B-x%3D5%2Cy%26%23178%3B-y%3D5%2C%E6%B1%82x%2By%E7%9A%84%E5%80%BC.3.k%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2Cx%26%23178%3B-4xy%2B4y%26%23178%3B-10x%2B20y%2Bk%26%23178%3B%2B9%E6%98%AF%E4%B8%80%E4%B8%AA%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%BC%8F%3F4.%E5%B7%B2%E7%9F%A5x%2By%2Bz%3Dm%2Cxy%2Byz%2Bxz%3Dn%2Cxyz%3Dp%2C%E7%94%A8%E5%90%ABm%E3%80%81n%E3%80%81p%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%EF%BC%88)
1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.2.已知x≠y,x²-x=5,y²-y=5,求x+y的值.3.k为何值时,x²-4xy+4y²-10x+20y+k²+9是一个完全平方式?4.已知x+y+z=m,xy+yz+xz=n,xyz=p,用含m、n、p的代数式表示(
1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.
2.已知x≠y,x²-x=5,y²-y=5,求x+y的值.
3.k为何值时,x²-4xy+4y²-10x+20y+k²+9是一个完全平方式?
4.已知x+y+z=m,xy+yz+xz=n,xyz=p,用含m、n、p的代数式表示(x+3)(y+3)(z+3)
1.已知x≠2y,x²-x=4y²-2y,求x+2y的值.2.已知x≠y,x²-x=5,y²-y=5,求x+y的值.3.k为何值时,x²-4xy+4y²-10x+20y+k²+9是一个完全平方式?4.已知x+y+z=m,xy+yz+xz=n,xyz=p,用含m、n、p的代数式表示(
x²-4y²+(x+2y)=0
(x+2y)(x-2y)+(x+2y)=0
(x+2y)(x-2y+1)=0
x+2y=0
x-2y+1=0
x=-1/2
y=1/4
1 x²-4y²=x-2y dei (x+2y)=1
2 tong shang
3 (x-2y)²-10(x-2y)+k2+9=(x-2y-5)2 dei k=+-4
4 展开吗