Ответ:
x ∈ [-2; 5]
Пошаговое объяснение:
D = 9 + 40 = 49
x₁ = (3 - 7)/2 = -2
x₂ = (3 + 7)/2 = 5
___[-2]/_/_/_/_/_/_/[5]_____
Д=9-4*1*(-10)=49
х1=(3+7)/2=10/2=5
х2=(3-7)/2=-4/2=-2
_____-2__________5_____>
...........//////////////
[-2; 5]
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Verified answer
Ответ:
x ∈ [-2; 5]
Пошаговое объяснение:
D = 9 + 40 = 49
x₁ = (3 - 7)/2 = -2
x₂ = (3 + 7)/2 = 5
___[-2]/_/_/_/_/_/_/[5]_____
Д=9-4*1*(-10)=49
х1=(3+7)/2=10/2=5
х2=(3-7)/2=-4/2=-2
_____-2__________5_____>
...........//////////////
[-2; 5]