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nataliyallove
@nataliyallove
July 2022
2
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Решите уравнения 5х^2+25х-111=-х^2-8х+9
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Chemist0
Тут уже миллион вариантов решения. Я сделаю так:
(делим обе части на 3)
2 votes
Thanks 4
BlackBerry111
5x^2+25x-111=-x^2-8x+9
6x^2+33x-120=0
D= 1089+2880= 3969= 63^2
x1= -33+63/12= 2,5
x2= -33-63/12=-8
1 votes
Thanks 4
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Answers & Comments
Тут уже миллион вариантов решения. Я сделаю так:
6x^2+33x-120=0
D= 1089+2880= 3969= 63^2
x1= -33+63/12= 2,5
x2= -33-63/12=-8