(x²+y²)²-4x²y²=?
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(x²+y²)²-4x²y²=?
(x²+y²)²-4x²y²=?
(x²+y²)²-4x²y²=?
原式
=x的4次方+2x²y²+y的4次方-4x²y²
=x的4次方-2x²y²+y的4次方
=(x²-y²)²
原式
=x的4次方+2x²y²+y的4次方-4x²y²
=x的4次方-2x²y²+y的4次方
=(x²-y²)²
(x²+y²)²-4x²y²=?
(x²+y²)²-4x²y²=?
(x²+y²)²-4x²y²=?
原式
=x的4次方+2x²y²+y的4次方-4x²y²
=x的4次方-2x²y²+y的4次方
=(x²-y²)²
原式
=x的4次方+2x²y²+y的4次方-4x²y²
=x的4次方-2x²y²+y的4次方
=(x²-y²)²