Mathematics
Senior High
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-3k(k-4)>0が
k(k-4)<0になるのはなぜですか?

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✨ Best Answer ✨

-3k(k-4)>0
両辺を3で割ると
-k(k-4)>0
両辺を-1で割ると、不等号の向きは逆になるので(ex.-4<1→4>-1)
k(k-4)<0
となります!!

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わかりやすく丁寧にありがとうございます😆

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