в болотистой местности падеж прилагательного

12х²+3x=0 , 25-100х²=0, 4-36х²=0, 2х²-14=0 ,3х²-6=0 , помогайтее :*

ОТВЕТИТЬ НА ВОПРОСЫ(ПОСЛЕ ТЕКСТА)

A smart little Bird flew (fly) to a house in the country because she wanted to have breakfast. She ... (run) from one room to another and suddenly she ... (see) a big grey Cat. The Cat ... (jump) and ... (catch) the Bird. "Now I can have a nice breakfast," the Cat ... (say).

"You can't have breakfast now," ... (say) the Bird. "You must wash first. The farmer and his family always (всегда) wash their hands before breakfast. You live in their house and you must do what they do."

"All right," the Cat ... (say). "I live with the farmer's family and in their house, and I must do what they do."

And the Cat opened his mouth and ... (begin) to wash. But when he ... (be) clean and ... (want) to begin his breakfast, he did not find the bird. The smart little Bird ... (fly) away. She ... (be) in the garden in a tall tree. She ... (be) happy and ... (begin) to sing.

"Now I see," the cat ... (say). "I must wash, but I must wash after dinner." And now all cats wash after dinner.

Нужно ответить на эти вопросы:

1) Why did the Bird fly to a house?
2) Why did the grey Cat catch the Bird?
3) Why did the grey Cat begin to wash?
4) Why didn't the grey Cat find the Bird?
5) Why did the grey Cat say, "I must wash after dinner? "