укажи сумму чисел 4 и 5 8 9 10

Решить уравнение. 3х²-27=0; 2х²-32=0; 4х²+20х=0; 3х²-12х=0;

ребят помогите пожалуйста не справляюсь!!!

надо перевести в косвенную ручь))

1. Did you see your granny yesterday Lena?" asked Mr Brown.

2. The doctor asked Nick  " Do you  wash your face and hands every morning".

3. The teacher said  to Mike " Does your father work  at  a factory?"

4. Mother  said to us "What are you doing your here?"

5. Father said to Nick "Have  you  done  your homework?"

6. She said " You  will  read  this  book in the 9th form."

7. Nelli said  "I read  Jane Eyre  last  year

8." You have not done  your work well," the  teather said to me 

9. Our teather said "Thackeray 's novels and very interesting."

10." my friends lives in Moscow", said Alic. 

решите уравнение методом введения новой переменной:

х+5√х-36=0

√х-36/√х=5