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8milka8
@8milka8
August 2022
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помогите 9 класс............
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snow99
1) Нули функции - это точки, у которых y=0.
-x^+x+6=0
x^2-x-6=0
D = 1-4*(-6)=25
x1=(1+5)/2 = 3,
x2=(1-5)/2= -2
Координаты вершины вычисляются из формулы:
Xв = -b/2a
Xв = -1/2*(-1) = 1/2
Yв = -(1/2)^2 + 1/2 + 6 = -1/4 + 1/2 + 6 = 1/4+6 = 6 целых 1/4
2) x=4
y= -4^2 + 4 + 6 = -6
3) и 4) на скриншоте.
5) (0,6), (4,-6)
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Answers & Comments
-x^+x+6=0
x^2-x-6=0
D = 1-4*(-6)=25
x1=(1+5)/2 = 3,
x2=(1-5)/2= -2
Координаты вершины вычисляются из формулы:
Xв = -b/2a
Xв = -1/2*(-1) = 1/2
Yв = -(1/2)^2 + 1/2 + 6 = -1/4 + 1/2 + 6 = 1/4+6 = 6 целых 1/4
2) x=4
y= -4^2 + 4 + 6 = -6
3) и 4) на скриншоте.
5) (0,6), (4,-6)