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Sg220899
@Sg220899
August 2021
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геометрия-алгебра помогите пожалуйста до 12:10 прошу!!!!!
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Tanya11062000
4. 9!!!!!!!!!!!!
5. т.к. АВ=СД и ВС=АД
то ВС=(46-14-14)/2=18/2=9
6. X^2+3x-9=0
D=9-4*1*(-9)=36+9=45
x1=(-3+√45)/2= (3(-1+
√5))/2
x2=(-3-√45)/2= (-3(1+√5))/2
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Answers & Comments
5. т.к. АВ=СД и ВС=АД
то ВС=(46-14-14)/2=18/2=9
6. X^2+3x-9=0
D=9-4*1*(-9)=36+9=45
x1=(-3+√45)/2= (3(-1+√5))/2
x2=(-3-√45)/2= (-3(1+√5))/2