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nyashec
@nyashec
August 2022
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4t(t-3)-t+3=? ПОМОГИИТЕ
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nastyaLS10
4t (t - 3) - t + 3 = 4t² - 12t - t + 3 = 4t² - 13t + 3
4t² - 13t + 3 = 0
D = b² - 4ac = (-13)² - 4 · 4 · 3 = 169 - 48 = 121
t₁ = (-b + √D)/2a = (13 + 11)/8 = 24/8 = 3
t₂ = (-b - √D)/2a = (13 - 11)/8 = 2/8 = 1/4 =0,25
Ответ: 3; 0,25
1 votes
Thanks 0
nyashec
ЭТО НЕ УРАВНЕНИЕ!
nastyaLS10
Тогда ответ в конце 1-ой строчки. Вы не указали, что нужно сделать в задании.
nastyaLS10
Не тратьте чужое время и впредь пишите задание, как оно указано в учебнике.
leraspivak
(4t·t-4t·3)-t+3=4t
²-
12t-t
+3=4t²-13t+3
0 votes
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Answers & Comments
4t² - 13t + 3 = 0
D = b² - 4ac = (-13)² - 4 · 4 · 3 = 169 - 48 = 121
t₁ = (-b + √D)/2a = (13 + 11)/8 = 24/8 = 3
t₂ = (-b - √D)/2a = (13 - 11)/8 = 2/8 = 1/4 =0,25
Ответ: 3; 0,25