корень(7-4*корень(3)) = корень(3)-2 почему не верно? у меня наооборот верно получается. Объясните

найдите все целые значения b при которых уравнение 9x квадрат+2bx+1=0 не имеет корней

В коробке 8 жуков и пауков,всего у них 54 ноги.Сколько в коробке жуков и сколько пауков?

Write down the sentences into correct order. 1. is / near / school / There / new / a / our / cinema 2. got / my / problem / I / with / have / homework / a 3. when / a / helps / she / thinks / problem / trouble / Mary / has / doll / her / a 4. well / think / your / very / I / don't / father / drives 5. to / we / On / a / restaurant / sometimes / Sundays / go 6. circus / went / with / we / ago / the / Two / my / to / parents / months 7. did / very / The / trick / well / magician / his 8. after / Jim / sister / Mother / look / asked / his / to / younger 9. her / Cindy / you / I / found / Can / tell / that / have / necklace 10. way / on / bike / Mike / on / already / been / his / to / his / school / has

тело массой 5 кг спускается равномерно на 5 м за 5 с. какова мощность, развиваемая силой тяжести?