Какое из квадратных уравнений является приведенным?

А. х квадрат+5=0

Б. 3х квадрат-4+х=0

В. х+2х квадрат -6=0

Г. 1+4х квадрат=0

найти площадь прямоугольника,если его длина 9 см,а ширинана 5 см меньше

в треугольнике abc угол c-прямой cos =0,6= bc=12 найдите AB

Помогите пожалуйста написать рассказ о спорте на казахском. Спасибо

Найдите и справьте ошибки в употреблении времён:

1.The jumper was shrinking when I had washed it.

2. Mike got really exhausted in his first marathon because he didn't  run such a long race before.

3. The light in the room showed that Mr. Simpson had been waiting for me.

4. The titanic had been travelling to NY when it hit an iceberg and sank in the Atlantic.

5. The footballer ran towards the goal when he fell over.

6. George said that he didn't decide yet which side to support.

7. I took the decision after I have spoken to him.

8. Bill was working at the same problem for two hours when Jack phoned him and asked if he solved it.

9. I knew that nick had boarded with ancAmerican family since his arrival and he had been learning a great deal about American habits and customs.

10. I found out when my pen friend didn't get my letters. I've been sending them to the wrong address!