search points attachment profile arrow left arrow right star heart verified symbols equation arrow-down question mark check menu accountancyadministrationagriculturalalgebraallarabicartart_musicbelarusbelarus_altbiologybusinesscatalachemistrychineseeconomicsegzamenglishentrepreneurshipenvironmentethicseuskarafirst_aidfrenchgalegogeographygeologygeometrygermangrammarhealthhistoryindia_langindonesian_langinformaticsitalianjapanesekazachkazach_altkoreanlanguagelatinlawlife_scienceliteraturelogicmathematicsmusicnigerian_langother_languagesotherspedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligionrpa_langrussianrussian_altsciencesecurityskillssocial_sciencesociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation accountancyadministrationagriculturalalgebraall_1arabicartart_music_2belarusbelarus_altbiologybusiness_2catalachemistry_1chineseeconomicsexam_3englishentrepreneurshipenvironment_2ethicseuskarasecurity_1frenchgalegogeography_4geology_4geometrygermangrammarhealthhistoryindia-langindonesian-langinformaticsitalianjapanesekazachAsset 230koreanlanguagelatinlawlife-scienceliteraturelogic_2mathematicsmusicnigerian-langotherlanguagesother_1pedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligion_1rpa-langrussianrussian_altsciencesecurity_3_mskills_1allsocial_science_5_msociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation
Автор - Arinkamandarinkaa

умоляю помогите ... не понимаю как решается

Ответ

Автор - evgenrubalko11

Ответ:

 - 36

Объяснение:

9 {x}^{2}  + bx - 28 = 0 \ 9 times  {(  - frac{2}{3} )}^{2}  + b times ( -  frac{2}{3} ) - 28 = 0 \ 9 times  frac{4}{9}  -  frac{2}{3} b - 28 = 0 \ 4 -  frac{2}{3} b - 28 = 0 \  -  frac{2}{3} b = 28 - 4 \ -  frac{2}{3} b = 24

И правую и левую части уравнения умножаем на -3/2

 -  frac{2}{3}b  times ( -  frac{3}{2} ) = 24 times ( -  frac{3}{2} ) \ b =  frac{ - 24  times 3}{2}  \ b =  - 36

Ответы и объяснения

По всем вопросам пишите на - vashurokk@rambler.ru
© 2025 Все права защищены