计算(x²+2xy+y²)(x²-xy+y²)²
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计算(x²+2xy+y²)(x²-xy+y²)²
![计算(x²+2xy+y²)(x²-xy+y²)²](/uploads/image/z/6550150-22-0.jpg?t=%E8%AE%A1%E7%AE%97%28x%26%23178%3B%2B2xy%2By%26%23178%3B%29%28x%26%23178%3B-xy%2By%26%23178%3B%29%26%23178%3B)
=(x+y)²(x-y)²
=[(x+y)(x-y)]²
=(x²-y²)²
=x^4-2x²y²+y^4
=[(x+y)(x-y)]²
=(x²-y²)²
=x^4-2x²y²+y^4
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