Предмет: Математика, автор: xxXGamerXxx210

Упростить выражения
-4(3a)^2+(6a-5c)(6a+5c)
4a^2-(b-2a)^2

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Автор ответа: kirausinska632
1

Ответ:

вот и все. надеюсь понятно

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OK, I want to chat about mobile phones. I have one but I hardly ever

use it. It just sits on my desk at home and is switched off most of the

time. So I believe I could live without a mobile phone.______________

What! Are you crazy Owl? I don’t agree at all. I definitely couldn’t live

without my mobile. Someone’s always texting or calling me to find out

where I am ...

6

I agree, Sun. Nor could I, My phone’s my best friend, I've got all

my numbers on it. I take pictures with it, I use it as an alarm to

wake me up in the morning ... I don’t think I could live without it.

I’m sorry, Cloud, but I don't agree. I think you’re addicted to your phones!

OK, I agree a mobile phone can be useful, but I don’t believe you couldn’t

live without one. We’ve only had mobiles for about 20 years. Before that

people lived for hundreds of thousands of years without them.

Yes, but did they have a social life?

Good one, Cloud!

I think it’s people with mobile phones who don’t have a social life. They're too busy taking caffs to speak to anyone

properly I just hate it, You're talking to someone, their phone rings and they stop talking to you! Why don’t they tell

the other person to call back? I think that’s so rude.

So do I. And I think it’s really bad that some people have their ring tone set really loud ...

That’s right, I agree absolutely Thanks for joining in, Doc,

I’m sorry but I don't agree with you, Doc. I believe it’s all about what kind of person you are. If you’ve got lots of

friends, then you love your phone, If you’re an anti-social type with no friends, then you don’t need one.

What! That’s rubbish, I’ve got lots of friends, real friends, people I meet and talk to face to face - not just

people you call on your mobile and say ‘What’re you doing?’ I don’t believe you need a mobile to have friends.

You’re right, Nor do I.

I lost my phone a couple of weeks ago and didn't have one for two whole days. I was lost, I just couldn't live

without i t ...

That's right. And hey Owl! What about if you were in an emergency situation? Wouldn’t you use your phone then?

Mobile phones have saved people’s lives ...

I’m not saying they’re not useful sometimes, I’m just saying people use them too much.
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