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???????? ???????????. ???????? ???????????? ? ????? ?????????? ? ???????? ??????????? ???? ax b>0 (?????? ????? > ????? ????,??????????,????? ?????? ???? ???????????),??? a ? b - ?????????????? ????? (??0). ???????. ??????? 1. ????? ???? ??????????? ????? ????????? ?? ????? ????? ??????????? ? ?

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1 , 2 , 3

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    1. ??????????? 1)???????? ??????????? ???????,?????? 2)?????????? ??????????? ???????,?????? 3)???????????? ??????????? ??????? ??????

    2. ???????? ??????????? ???????? ???????????? ? ????? ?????????? ? ???????? ??????????? ???? ax+b>0 (?????? ????? > ????? ????,??????????,????? ?????? ???? ???????????),??? a ? b - ?????????????? ????? (??0)

    3. ??????? ??????? 1. ????? ???? ??????????? ????? ????????? ?? ????? ????? ??????????? ? ?????? ? ??????????????? ??????,?? ????? ??? ???? ????? ???????????. ??????? 2. ??? ????? ??????????? ????? ???????? ??? ????????? ?? ???? ? ???? ????????????? ?????,?? ????? ??? ???? ????? ???????????. ??????? 3. ??? ????? ??????????? ????? ???????? ??? ????????? ?? ???? ? ???? ????????????? ?????,??????? ??? ???? ???? ??????????? ?? ??????????????? (<??>,=??=).

    4. ?????? ?????? ??????????? ???????:??????? ??? ????? ??????????? ?? ????????????? ????? 15,??????? ???? ??????????? ??? ????????? (??????? 2).??? ???????? ??? ???????????? ?? ????????????,?.?. ??????? ? ????? ???????? ???????????,????????????? ???????:

    5. ???????????????? ???????? 1 ??????? ??????????,????????? ???? 30x ?? ?????? ????? ??????????? ? ?????,? ???? -3 –?? ????? ????? ? ?????? (? ???????????????? ???????).???????: 11x-30x>-1+3; -17x>2. ???????, ???????? ??????? 3,???????:

    6. ?????????? ??????????? ?????????? ???????????? ? ????? ?????????? x ???????? ??????????? ???? ax²+bx+c>0 ,??? a,b,c –?????????????? ????? (????? a=0).

    7. ??????? ??????? 1.???? ?????????? ???????? ax²+bx+c ?? ????? ?????? (?.?. ??? ???????????? D-????????????? ?????)? ???? ??? ???? a>0,?? ??? ???? ????????? ? ??????????? ??????????? ax²+bx+c>0. ????? ???????, ???? D<0,?>0,?? ??????????? ax²+bx+c>0 ??????????? ??? ???? ?; ????????, ??????????? ax²+bx+c=0 ? ???? ?????? ?? ????? ???????.

    8. ??????? ??????? 2.???? ?????????? ???????? ax²+bx+c ?? ????? ?????? (?.?. ??? ???????????? D-????????????? ?????)? ???? ??? ???? ?<0 ,?? ??? ???? ????????? ? ??????????? ??????????? ax²+bx+c<0. ????? ??????, ???? D<0,a<0,?? ??????????? ax²+bx+c<0 ??????????? ??? ???? ?; ????????,??????????? ax²+bx+c=0 ? ???? ?????? ?? ????? ???????. ??? ???????????-??????? ?????? ????????? ???????.

    9. ??????? ???? ?????????? ???????? ax²+bx+c ????? ????????????? ????????????, ?? ??? ????? ? ???????? ????????? ????? ???? ???????? ???????????? ?.

    10. ?????? ?????? ??????????? x²-6?+8>0. ???????: ???????? ?????????? ???????? x²-6?+8 ?? ???????? ?????????. ?????? ????????? ???????? ????? 2 ? 4.???????????????? ????????? ?? ????? ??????? ??? 8-?? ???????? ax²+bx+c= ?(?-?1)(?-?2), ???????: ?²-6?+8=(?-2)(?-4). ??????? ?? ???????? ?????? ????? ?????????:2 ? 4. (???????). ???????, ????? ???????????? (?-2)(?-4) ????????????, ? ????? ????????????.

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