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korotsinskyay
@korotsinskyay
July 2022
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решите уравнение х^2+7х-18=0
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нлоо
Х^2+7х-18=0
D = b^2 - 4 * a * c =
(7)^2 - 4 * (1) * (-18) = 121
Т.к. D > 0, то уравнение имеет два корня.
x1 = (-b +√(D)) / (2*a)=(-7+√121)/2
x2 = (-b - √(D)) / (2*a)=(-7-√121)/2
x1=2
x2=−9
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Answers & Comments
D = b^2 - 4 * a * c =
(7)^2 - 4 * (1) * (-18) = 121
Т.к. D > 0, то уравнение имеет два корня.
x1 = (-b +√(D)) / (2*a)=(-7+√121)/2
x2 = (-b - √(D)) / (2*a)=(-7-√121)/2
x1=2
x2=−9