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minnnimaus
@minnnimaus
June 2022
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Решите уравнение:
-7х+17 √х +90=0
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rudlarpar
Пусть корень из х равен t>=0 -7t^2+17t+90=0 7t^2-17t-90=0 D=289+2520=2809 t1=(17+53)/14=5 t2=(17-53)/2=-18/7 <0 Корень из х=5 х=25
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