2次関数のｸﾞﾗﾌと2次不等式1

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高校数学Ⅰのｾｸｼｮﾝ単位授業になります。わかりやすく、丁寧な説明を行っています。教科書を見てもよくわからなかった人、授業を休んで聞けなかった人、定期試験前の内容復習に役立ててください。 • 当方、家庭教師歴20年でいろいろな生徒さんを担当しました。","styleRuns":[{"startIndex":0,"length":123,"styleRunExtensions":{"styleRunColorMapExtension":{"colorMap":[{"key":"USER_INTERFACE_THEME_DARK","value":4294967295},{"key":"USER_INTERFACE_THEME_LIGHT","value":4279440147}]}},"fontFamilyName":"Roboto"}]},"headerRuns":[{"startIndex":0,"length":123,"headerMapping":"ATTRIBUTED_STRING_HEADER_MAPPING_UNSPECIFIED"}]}},{"itemSectionRenderer":{"contents":[{"messageRenderer":{"text":{"runs":[{"text":"Comments are turned off. 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