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AnuarAAA
@AnuarAAA
July 2022
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2x^2+5x-18как решить
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sophi17
4х+5х=18
9х=18
х=2
проверка:
2×2+5×2-18=0
0 votes
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lilisamerhanowa
2x^2+5x-18=0 (a=2; b=5; c=-18)
D=b^2-4ac=25+4*2*18=169=13^2
x(1)=(-5+13)/4=2
x(2)=(-5-13)/4=-4,5
Ответ: 2; -4,5
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Thanks 0
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Answers & Comments
9х=18
х=2
проверка:
2×2+5×2-18=0
D=b^2-4ac=25+4*2*18=169=13^2
x(1)=(-5+13)/4=2
x(2)=(-5-13)/4=-4,5
Ответ: 2; -4,5