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suxelena
@suxelena
July 2022
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Решите уравнения (13х+29)в квадрате -19(13х+29)+48=0
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Universalka
Verified answer
(13x + 29)² - 19(13x + 29) + 48 = 0
Обозначим 13x + 29 = y, тогда
y² - 19y + 48 = 0
D = 19² - 4*48 = 169
Y1,2 = (19 + - 13) / 2
Y1 = (19 + 13) / 2 = 16
Y2 = (19 - 13) / 2= 3
13x + 29 = 16 13x + 29 = 3
13x = - 13 13x = - 26
x = - 1 x = - 2
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Answers & Comments
Verified answer
(13x + 29)² - 19(13x + 29) + 48 = 0Обозначим 13x + 29 = y, тогда
y² - 19y + 48 = 0
D = 19² - 4*48 = 169
Y1,2 = (19 + - 13) / 2
Y1 = (19 + 13) / 2 = 16
Y2 = (19 - 13) / 2= 3
13x + 29 = 16 13x + 29 = 3
13x = - 13 13x = - 26
x = - 1 x = - 2