化简:(1)(-x²+y²)²;(2)(x+2y-3z)(x-2y+3z).
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![化简:(1)(-x²+y²)²;(2)(x+2y-3z)(x-2y+3z).](/uploads/image/z/759470-14-0.jpg?t=%E5%8C%96%E7%AE%80%EF%BC%9A%281%29%28-x%26%23178%3B%2By%26%23178%3B%29%26%23178%3B%3B%282%EF%BC%89%28x%2B2y-3z%EF%BC%89%EF%BC%88x-2y%2B3z%29.)
化简:(1)(-x²+y²)²;(2)(x+2y-3z)(x-2y+3z).
化简:(1)(-x²+y²)²;(2)(x+2y-3z)(x-2y+3z).
化简:(1)(-x²+y²)²;(2)(x+2y-3z)(x-2y+3z).
(1)是乱码
(2)(x+2y-3z)(x-2y+3z)=[x+(2y-3z)][x-(2y-3z)]=x的二次方-(2y-3z)的二次方