Log₂(x^2-18x)=log₂(20x-360). Created by ewewweesonya. algebra-ru

Log₂(x^2-18x)=log₂(20x-360)...

August 2022 1 13 Report

Log₂(x^2-18x)=log₂(20x-360)

Answers & Comments

армения20171 ОДЗ х^2-18х>0;х(х-18)>0;х€(-бес ;0)U
(18;+бес)
20х-360>0;х>18
log(2)(x^2-18x)=log(2)(20x-360)
x^2-18x=20x-360
x^2-38x+360=0
D=38^2-4•360=1444-1440=4
x1=(38+2)/2=20
x2=(38-2)/2=18
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