Mathematics
Junior High
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なぜ9ではなく−6を約分しますか?m(_ _)m
(5)
2x+9
39 × (-6)
(6)
_ (2x+9) × (−6)
3
= (2r+9) × (-2)
=2rx(-2)+9×(-2)=-4x-18
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なるほどです。ありがとうございます(,,ᴗˬᴗ,,)⁾⁾⁾