Чтобы данное выражение равнялась нулю необходимо, чтобы одна из скобок равнялась нулю. приравнять каждую из них к нулю х-2=0 отсюда х=2 х+5=0 х=-5 сделаем проверку (2-2)*(2+5)=0*7=0 (5-2)(-5+5)=3*0=0
1) ...White Sea isin ... north of our country. 2) Where is the... Red Sea situated? 3) The...Volga is one of the longest rivers in Europe. 4) The... Caspian Sea is in .the.. south of Russia. 5) ... Moscow and ... St Petersburg are famous for their museums. 6) .The..Urals are old mountains, they are not very high. 7) The... Pacific Ocean is in the...east of our country. 8) ... Lake Baikal is the deepest lake in ... Siberia. 9) ... Tverskaya Street is in the centre of ... Moscow. 10) ... Hyde Park is in the centre of ... London.
1. There are many students from all over the world living and studying here, aren't there? 2/ Will you be studying at the English Language School for a whole school year? 3/ Can’t you believe it? 4/ Your days are unforgettable, aren't they? 5/ Are you learning so much every moment? 6/ Thing are going very well for you here, aren't they? 7/Did you ask me to describe my host family, my new friends and many other things? 9/ Is your host family really very nice and hospitable? 10/ Their names are Jennifer and Christian, aren't they? 11/ Have they got a son John? 12/ Is Jennifer a housewife or a teacher? 13/ Does she take care of the family? 14/ Is she very understanding and loving? 15/ Christian is a mechanic, isn't he? 16/ Is he serious about his work and polite? 17/ What can you say about John? 18/ Is it very interesting for you to practice English? 19/ Do you love to speak and learn new English words? 20/ Is Cambridge wonderful? 21/ Are you going to have a party tomorrow in our language school? 22/ Where are you going next weekend?
приравнять каждую из них к нулю
х-2=0 отсюда х=2
х+5=0 х=-5
сделаем проверку
(2-2)*(2+5)=0*7=0
(5-2)(-5+5)=3*0=0