Предмет: Математика, автор: daratsydd666

пожалуйста помогите

Приложения:

Ответы

Автор ответа: vdenk2008

1

Ответ:

x^2-y^2=(x-y)(x+y)=12

(x+y)*2=12

х+у=6

решим систему х-у=2

х+у=6

сложим эти два уравнения и получим 2х=8

х=4

тогда у=4-2=2

ответ х=4 и у=2

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: 147896

Read Denis letter and complete the sentences. Помогите пожалуйста ответить на вопросы! This summer Denis _____He was lucky because _____His frwends and he
spent a lot of time outdoors _____They alsu enjoyed ______In the evening they usually made a fire ______Denis has a lot of _____He asked his granny to _____

dear Barbara thank you for your letter.I really miss you,too.I think its a great idea to visit you in London.All of us hope to get the invitation letter very soon.What can I tell you about my holidays?This summer I was in the country.I was very lucky.the weather was fine all the time outdoors swimming,diving,riding our bikes and skateboarding.We also enjoyed picking berries and gathering mushrooms in the nearest forest.In the evening we usually made a fire,played the guitar and sang songs.I took a lot of pictures of my friends and of myself.This one is for you.I hope youll recognize me.You see that I am bigger than I was last year. I know you have a sweet tooth,Barbara,so I asked my granny to make some charry jam.(I helped her a little.)If we come to London,youll have to try it.With lost of love and best wishes from me and my friends.Your former pupil Denis Korolev

2 года назад

Предмет: Русский язык, автор: Baidikov

Составте предложения с словосочитаниями : мутить воду , филькина грамота, от горшка два вершка, белые мухи, грести лопатой, тёртый калач

2 года назад

Предмет: Английский язык, автор: эммилия7

Directors _____________ films.
А. play
Б. read
В. write
Г. shoot

2 года назад

Предмет: Математика, автор: кудряшка5

помогите ((((((((((((((((

8 лет назад

Предмет: Математика, автор: dasha2248

сделать все три задания

8 лет назад