Mathematics
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α²+β²-2(k-1)(α+β)+4=α+β
の式を変形すると
(α+β)²-2αβ+(-2k+1)(α+β)+4=0になるんですが、
上の右辺のα+βが変形後の式では0になるのは何故ですか?
Answers
Answers
α²+β²-2(k-1)(α+β)+4−(α+β)=0
α²+β²+(α+β)(-2(k-1)−1)+4=0
(α+β)²-2αβ+(-2k+1)(α+β)+4=0
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