若m四次方+n四次方-6=m²-2m²n²+n²,求m²+n²的值.急.
若m四次方+n四次方-6=m²-2m²n²+n²,求m²+n²的值.急.
數(shù)學(xué)人氣:108 ℃時間:2019-08-20 00:55:41
優(yōu)質(zhì)解答
(m²+n²)²-2m²n²-6=m²-2m²n²+n²所以,得(m²+n²)²-6=m²+n²;接下來相當(dāng)于x²-6=x;這個你應(yīng)該會算吧,x就等于m²+n²算出來x=-...
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