x的四次方+x²y²+y的四次方
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![x的四次方+x²y²+y的四次方](/uploads/image/z/6954532-52-2.jpg?t=x%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9%2Bx%26%23178%3By%26%23178%3B%2By%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9)
x的四次方+x²y²+y的四次方
x的四次方+x²y²+y的四次方
x的四次方+x²y²+y的四次方
x^4+x²y²+y^4
=x^4+2x²y²+y^4-x²y²
=(x²+y²)²-x²y²
=(x²+y²-xy)(x²+y²+xy)
x的四次方+x²y²+y的四次方
=x^4+2x²y²+y^4-x²y²
=(x²+y²)²-x²y²
=(x²+y²+xy)(x²+y²-xy)