Log2 (x^2-4x-1)=2 помогите!)...

June 2022 1 39 Report

Log2 (x^2-4x-1)=2 помогите!)

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sharadi

Verified answer

2 ^ 2 = х^2 - 4х - 1
Х^2 - 4х - 5 = 0
D = 16 + 20 = 36 = 6^2
X1 = ( 4 + 6 ) : 2 = 5
X2 = ( 4 - 6 ) : 2 = - 1

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