Постройте график линейной функции y=2x-6 с его помощью найдите: 1. наибольшее и наименьшее значение функции на отрезке [-1;2] 2. значение аргумента при которых y=0; y<0

помогите пожалуйста! разложить

1) a3-ab-a2b+a2

2) x2y-x2-xy+x3

3) a2-9b2+12bc-4c2

2,3 это степень

ПОМОГИТЕ !!!!!!!!!!!! СРОЧНО!!!!!!!!!!!! БУДУ ВАМ ОЧЕНЬ БЛАГОДАРEН!!!!!!!!!! Choose the right answer. 
1. I...get up very early day. I live near the school .
a.mustn/t    b.don/t have to c.     won/t have to
2.My mother is .... school teachher. a.a b.the c.-(nothing) 
3.Look at the man ... is stahding in the corner.
a.who  b.which c.where 
4.We need ... tomatoes . I/m going to the shop.
a.some b.any c.few
5.He is very popular and has .... friends .
a.many b.much c.a lot of 
6.Everybody in our class ...... English . 
a.like b.likes c.will likes
7.My parents don`t know......about Star Wars
a) nothing b) everything c) anything 
8. Kate has a problem. Let ... talk to me about it 
a) her b) him c) me
9.Last year our family ... to the sea. 
a) went b) go c) is going 
10.Who ... you do your homework yesterday? 
a) helps b) helped c) help