平方差公式题.一下是几道比较复杂的平方差公式题:(1)2003(平方)-2002*2004(2)(x+y+2)(x-y-2)(3)(x-2y+z)(x+2y-z)(4)3(2y+1)(1-2y)-4(-3y-2(3y-2)
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![平方差公式题.一下是几道比较复杂的平方差公式题:(1)2003(平方)-2002*2004(2)(x+y+2)(x-y-2)(3)(x-2y+z)(x+2y-z)(4)3(2y+1)(1-2y)-4(-3y-2(3y-2)](/uploads/image/z/7638154-34-4.jpg?t=%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%85%AC%E5%BC%8F%E9%A2%98.%E4%B8%80%E4%B8%8B%E6%98%AF%E5%87%A0%E9%81%93%E6%AF%94%E8%BE%83%E5%A4%8D%E6%9D%82%E7%9A%84%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%85%AC%E5%BC%8F%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%892003%EF%BC%88%E5%B9%B3%E6%96%B9%EF%BC%89-2002%2A2004%EF%BC%882%EF%BC%89%EF%BC%88x%2By%2B2%29%28x-y-2%29%EF%BC%883%EF%BC%89%28x-2y%2Bz%29%28x%2B2y-z%29%EF%BC%884%EF%BC%893%282y%2B1%29%281-2y%29-4%28-3y-2%283y-2%29)
平方差公式题.一下是几道比较复杂的平方差公式题:(1)2003(平方)-2002*2004(2)(x+y+2)(x-y-2)(3)(x-2y+z)(x+2y-z)(4)3(2y+1)(1-2y)-4(-3y-2(3y-2)
平方差公式题.
一下是几道比较复杂的平方差公式题:
(1)2003(平方)-2002*2004
(2)(x+y+2)(x-y-2)
(3)(x-2y+z)(x+2y-z)
(4)3(2y+1)(1-2y)-4(-3y-2(3y-2)
平方差公式题.一下是几道比较复杂的平方差公式题:(1)2003(平方)-2002*2004(2)(x+y+2)(x-y-2)(3)(x-2y+z)(x+2y-z)(4)3(2y+1)(1-2y)-4(-3y-2(3y-2)
(1)2003²-2002*2004=2003²-(2003-1)(2003+1)=2003²-(2003²-1)=1
(2)(x+y+2)(x-y-2)=[x+(y+2)][x-(y+2)]=x²-(y+2)²
(3)(x-2y+z)(x+2y-z)=[x+(-2y+z)][x-(-2y+z)]=x²-(z-2y)²
(4)3(2y+1)(1-2y)-4(-3y-2)(3y-2) =3(1-4y²)-4(4-9y²)=24y²-13
是求化简吧?
1)(2004-1)(2002+1)-2002*2004
2)[x+(y+2)]*[x-(y+2)]
3)[x-(2y-z)][x+(2y-z)}
4自己)可以完成
简答不够详细,望谅解
(1)原式=2003²-(2003-1)(2003+1)
=2003²-2003²-1²
=-1
(1)(2004-1)(2002+1)-2002*2004