Ответ:
= 4/3 b²+4b+3=0
4b²+12b+9=0
(2b+3)²=0
2b+3=0
2b=-3
b= -3/2
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Ответ:
= 4/3 b²+4b+3=0
4b²+12b+9=0
(2b+3)²=0
2b+3=0
2b=-3
b= -3/2