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meqamamtut
@meqamamtut
August 2022
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3х^2-5х-2 <=0
помогите пожалуйста
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Universalka
Verified answer
3x² - 5x -2 <=0
3(x -2)(x + 1/3) <=0
(x - 2)(x + 1/3) <=0
x э [- 1/3; 2]
1 votes
Thanks 1
meqamamtut
откуда одна третья?
Universalka
2 и - 1/3 - это корни квадратного трёхчлена _
Universalka
3x² - 5x - 2 =0
meqamamtut
можншь через дискриминант показать, пожалуйста
Universalka
D = 25 - 4 * 3* (-2) = 49 X1,2 = (5 +-√49)/6 = (5 +- 7)/6 X1 = (5 + 7)/6 = 2 X2 = (5 - 7)/6 = - 1/3
meqamamtut
спасибо
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Answers & Comments
Verified answer
3x² - 5x -2 <=03(x -2)(x + 1/3) <=0
(x - 2)(x + 1/3) <=0
x э [- 1/3; 2]