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любопытная11
@любопытная11
July 2022
1
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Решите уравнение:
[tex] x^{2} -7x=18[/tex]
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Juliaa21
X²-7x-18=0
D=49-4*1*(-18)=49+72=121
7+11
x1=______=18/2=9
2
7-11
x2=______=-4/2=-2
2
Ответ:-2;9
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Answers & Comments
D=49-4*1*(-18)=49+72=121
7+11
x1=______=18/2=9
2
7-11
x2=______=-4/2=-2
2
Ответ:-2;9